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Module Chart exports two functions: bar chart and pie chart
--<source lang=lua>
--[[
keywords are used for languages: they are the names of the actual
parameters of the template
]]


; Note - [[Template:Graph:Chart]] is an alternative template, that may be more suitable for your use case.
local keywords = {
barChart = 'bar chart',
pieChart = 'pie chart',
width = 'width',
height = 'height',
stack = 'stack',
colors = 'colors',
group = 'group',
xlegend = 'x legends',
yticks = 'y tick marks',
tooltip = 'tooltip',
accumulateTooltip = 'tooltip value accumulation',
links = 'links',
defcolor = 'default color',
scalePerGroup = 'scale per group',
unitsPrefix = 'units prefix',
unitsSuffix = 'units suffix',
groupNames = 'group names',
hideGroupLegends = 'hide group legends',
slices = 'slices',
slice = 'slice',
radius = 'radius',
percent = 'percent',


==Drawing Bar charts: "bar chart"==
} -- here is what you want to translate


===Parameters===
local defColors = require "Module:Plotter/DefaultColors"
local hideGroupLegends


{| class="wikitable"
local function nulOrWhitespace( s )
|-
return not s or mw.text.trim( s ) == ''
! parameter name !! what it does
end
|-
|delimiter || string to delimit multiple values when given. default to colon ( : ). normally you do not want to touch this, it's provided for the off-chance you'll want to use colon as part of one of the parameters.
|-
|width ||number. if provided, must be at least 200. default: 500
|-
|height ||number. if provided, must be at least 200. default: 350
|-
|group n || (where "n" is a number. use "group 1", "group 2" etc. for as many groups as there are in the graph) the values to be charted. see below.
|-
|tooltip n || tooltip to be associated with specific bar. If no tooltip for a specific bar is defined, and this bar has a link, then this link will be used as tooltip. Otherwise, the tooltip will be combined from the group name and the value, optionally with "units prefix" and "units suffix".
|-
|links n || links to articles to be associated with specific bar
|-
|stack || whether to stack the different groups on top of each other. do not specify to show bars side by side. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
|-
|{{nowrap|tooltip value accumulation}} || useful only with stack: when set to true, tooltip will show accumulated value of all blocks up to current one
|-
|colors || the colors used to denote the various groups. should have exactly as many values as # of groups. can be given as standard html-recognized color names, or using #xxx or #xxxxxx notation.
|-
|x legends || The legends for the X values. Wikicode, such as internal links or templates can be used.
|-
|{{nowrap|hide group legends}} || if set to true, group legends will not be shown below chart. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
|-
|{{Nowrap|scale per group}} || set to use separate Y- scale for each group. leave empty to use one scale for all groups. incompatible with "stack". Note that even if some of the scales are exactly the same, they will be drawn separately when this setting is on. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
|-
|{{nowrap|units prefix}} || used in tooltip. e.g., $, so values will show as "$500" instead of "500" in the tooltip
|-
|{{nowrap|units suffix}} || ditto for units suffix. use, e.g. "Kg" so values will show as 88Kg instead of 88 in tooltip. underscore ("_") are replaced by spaces, to allow a space between the value and the suffix.
|-
| {{nowrap|group names}} || names of different groups
|-
| {{nowrap|y tick marks}} || number of tick marks on the y axis. if the value is negative or omitted, the module will attempt to automatically calculate a sensible number of tick marks.
|}


===Examples===
local function createGroupList( tab, legends, cols )
if #legends > 1 and not hideGroupLegends then
table.insert( tab, mw.text.tag( 'div' ) )
local list = {}
local spanStyle = "padding:0 1em;background-color:%s;border:1px solid %s;margin-right:1em;-webkit-print-color-adjust:exact;"
for gi = 1, #legends do
local span = mw.text.tag( 'span', { style = string.format( spanStyle, cols[gi], cols[gi] ) }, '&nbsp;' ) .. ' '.. legends[gi]
table.insert( list, mw.text.tag( 'li', {}, span ) )
end
table.insert( tab,
mw.text.tag( 'ul',
{style="width:100%;list-style:none;-webkit-column-width:12em;-moz-column-width:12em;column-width:12em;"},
table.concat( list, '\n' )
)
)
table.insert( tab, '</div>' )
end
end


==== Basic ====
function pieChart( frame )
<pre>
local res, imslices, args = {}, {}, frame.args
{{ #invoke:Chart | bar chart
local radius
| group 1 = 40 : 50 : 60 : 20
local values, colors, names, legends, links = {}, {}, {}, {}, {}
| group 2 = 20 : 60 : 12 : 44
local delimiter = args.delimiter or ':'
| group 3 = 55 : 14 : 33 : 5
local lang = mw.getContentLanguage()
| links 1 = Apple : McCintosh : Golden delicious
| links 2 = Banana : Apricot : Peach
| links 3 = Orange : Pear : Bear
| tooltip 2 = tooltip 1 : tooltip 2 : tooltip 3 : tooltip 4
| colors = green : yellow : orange
| group names = Apple : Banana : Orange
| x legends = Before : During : After : Post mortem
}}
</pre>


function getArg( s, def, subst, with )
local result = args[keywords[s]] or def or ''
if subst and with then result = mw.ustring.gsub( result, subst, with ) end
return result
end


{{ #invoke:Chart | bar chart
function analyzeParams()
| group 1 = 40 : 50 : 60 : 20
function addSlice( i, slice )
| group 2 = 20 : 60 : 12 : 44
local value, name, color, link = unpack( mw.text.split( slice, '%s*' .. delimiter .. '%s*' ) )
| group 3 = 55 : 14 : 33 : 5
values[i] = tonumber( lang:parseFormattedNumber( value ) )
| links 1 = Apple : McCintosh : Golden delicious
or error( string.format( 'Slice %d: "%s", first item("%s") could not be parsed as a number', i, value or '', sliceStr ) )
| links 2 = Banana : Apricot : Peach
colors[i] = not nulOrWhitespace( color ) and color or defColors[i * 2]
| links 3 = Orange : Pear : Bear
names[i] = name or ''
links[i] = link
| tooltip 2 = tooltip 1 : tooltip 2 : tooltip 3 : tooltip 4
end
| colors = green : yellow : orange
| group names = Apple : Banana : Orange
| x legends = Before : During : After : Post mortem
radius = getArg( 'radius', 150 )
}}
hideGroupLegends = not nulOrWhitespace( args[keywords.hideGroupLegends] )
local slicesStr = getArg( 'slices' )
local prefix = getArg( 'unitsPrefix', '', '_', ' ' )
local suffix = getArg( 'unitsSuffix', '', '_', ' ' )
local percent = args[keywords.percent]
local sum = 0
local i, value = 0
for slice in mw.ustring.gmatch( slicesStr or '', "%b()" ) do
i = i + 1
addSlice( i, mw.ustring.match( slice, '^%(%s*(.-)%s*%)$' ) )
end
for k, v in pairs(args) do
local ind = mw.ustring.match( k, '^' .. keywords.slice .. '%s+(%d+)$' )
if ind then addSlice( tonumber( ind ), v ) end
end
for _, val in ipairs( values ) do sum = sum + val end
for i, value in ipairs( values ) do
local addprec = percent and string.format( ' (%0.1f%%)', value / sum * 100 ) or ''
legends[i] = mw.ustring.format( '%s: %s%s%s%s', names[i], prefix, lang:formatNum( value ), suffix, addprec )
links[i] = mw.text.trim( links[i] or mw.ustring.format( '[[#noSuchAnchor|%s]]', legends[i] ) )
end
end


function addRes( ... )
for _, v in pairs( { ... } ) do
table.insert( res, v )
end
end


====Stacked====
function createImageMap()
Here is the same graph, with more modest height and width, using "stack", and adding "units suffix" for good measure:
addRes( '{{#tag:imagemap|', 'Image:Circle frame.svg{{!}}' .. ( radius * 2 ) .. 'px' )
addRes( unpack( imslices ) )
addRes( 'desc none', '}}' )
end


<pre>
function drawSlice( i, q, start )
{{ #invoke:Chart | bar chart
local color = colors[i]
| height = 250
local angle = start * 2 * math.pi
| width = 300
local sin, cos = math.abs( math.sin( angle ) ), math.abs( math.cos( angle ) )
| stack = 1
local wsin, wcos = sin * radius, cos * radius
| group 1 = 40 : 50 : 60 : 20
local s1, s2, w1, w2, w3, w4, width, border
local style
| group 2 = 20 : 60 : 12 : 44
if q == 1 then
| group 3 = 55 : 14 : 33 : 5
| colors = green : yellow : orange
border = 'left'
| group names = Apple : Banana : Orange
w1, w2, w3, w4 = 0, 0, wsin, wcos
| units suffix = Kg
s1, s2 = 'bottom', 'left'
| x legends = Before : During : After : Post mortem
elseif q == 2 then
}}
border = 'bottom'
</pre>
w1, w2, w3, w4 = 0, wcos, wsin, 0
s1, s2 = 'bottom', 'right'
elseif q == 3 then
border = 'right'
w1, w2, w3, w4 = wsin, wcos, 0, 0
s1, s2 = 'top', 'right'
else
border = 'top'
w1, w2, w3, w4 = wsin, 0, 0, wcos
s1, s2 = 'top', 'left'
end


{{ #invoke:Chart | bar chart
local style = string.format( 'border:solid transparent;position:absolute;%s:%spx;%s:%spx;width:%spx;height:%spx', s1, radius, s2, radius, radius, radius )
| height = 250
if start <= ( q - 1 ) * 0.25 then
| width = 300
style = string.format( '%s;border:0;background-color:%s', style, color )
| stack = 1
else
| group 1 = 40 : 50 : 60 : 20
style = string.format( '%s;border-width:%spx %spx %spx %spx;border-%s-color:%s', style, w1, w2, w3, w4, border, color )
end
| group 2 = 20 : 60 : 12 : 44
| group 3 = 55 : 14 : 33 : 5
addRes( mw.text.tag( 'div', { style = style }, '' ) )
| colors = green : yellow : orange
end
| units suffix = Kg
| group names = Apple : Banana : Orange
| x legends = Before : During : After : Post mortem
}}


function createSlices()
function coordsOfAngle( angle )
return ( 100 + math.floor( 100 * math.cos( angle ) ) ) .. ' ' .. ( 100 - math.floor( 100 * math.sin( angle ) ) )
end


====Scale per group====
local sum, start = 0, 0
for _, value in ipairs( values ) do sum = sum + value end
for i, value in ipairs(values) do
local poly = { 'poly 100 100' }
local startC, endC = start / sum, ( start + value ) / sum
local startQ, endQ = math.floor( startC * 4 + 1 ), math.floor( endC * 4 + 1 )
for q = startQ, math.min( endQ, 4 ) do drawSlice( i, q, startC ) end
for angle = startC * 2 * math.pi, endC * 2 * math.pi, 0.02 do
table.insert( poly, coordsOfAngle( angle ) )
end
table.insert( poly, coordsOfAngle( endC * 2 * math.pi ) .. ' 100 100 ' .. links[i] )
table.insert( imslices, table.concat( poly, ' ' ) )
start = start + values[i]
end
end


This option has been disabled. It was rarely used and broke in the last code update.
analyzeParams()
Here is an example with large number of groups - mainly to test how it looks with large number of legends:
if #values == 0 then error( "no slices found - can't draw pie chart" ) end
addRes( mw.text.tag( 'div', { class = 'chart noresize', style = string.format( 'margin-top:0.5em;max-width:%spx;', radius * 2 ) } ) )
addRes( mw.text.tag( 'div', { style = string.format( 'position:relative;min-width:%spx;min-height:%spx;max-width:%spx;overflow:hidden;', radius * 2, radius * 2, radius * 2 ) } ) )
createSlices()
addRes( mw.text.tag( 'div', { style = string.format( 'position:absolute;min-width:%spx;min-height:%spx;overflow:hidden;', radius * 2, radius * 2 ) } ) )
createImageMap()
addRes( '</div>' ) -- close "position:relative" div that contains slices and imagemap.
addRes( '</div>' ) -- close "position:relative" div that contains slices and imagemap.
createGroupList( res, legends, colors ) -- legends
addRes( '</div>' ) -- close containing div
return frame:preprocess( table.concat( res, '\n' ) )
end


<pre>
{{ #invoke:Chart | bar chart
| width = 800
| height = 550
| group 1 = 1:2:3:4:5:4:3:2:1
| group 2 = 1:2:3:4:5:4:3:2:1
| group 3 = 1:2:3:4:5:4:3:2:1
| group 4 = 1:2:3:4:5:4:3:2:1
| group 5 = 1:2:3:4:5:4:3:2:1
| group 6 = 1:2:3:4:5:4:3:2:1
| group 7 = 1:2:3:4:5:4:3:2:1
| group 8 = 1:2:3:4:5:4:3:2:1
| group 9 = 1:2:3:4:5:4:3:2:1
| group 10 = 1:2:3:4:5:4:3:2:1
| group 11 = 1:2:3:4:5:4:3:2:1
| group 12 = 1:2:3:4:5:4:3:2:1
| group 13 = 1:2:3:4:5:4:3:2:1
| group 14 = 1:2:3:4:5:4:3:2:1
| group 15 = 1:2:3:4:5:4:3:2:1
| group 16 = 1:2:3:4:5:4:3:2:1
| group 17 = 1:2:3:4:5:4:3:2:1
| group 18 = 1:2:3:4:5:4:3:2:1
| group 19 = 1:2:3:4:5:4:3:2:1
| group 20 = 1:2:3:4:5:4:3:2:1
| group 21 = 1:2:3:4:5:4:3:2:1
| colors = Silver:Gray:Black:Red:Maroon:Yellow:Olive:Lime:Green:Aqua:Teal:Blue:Navy:Fuchsia:Purple:ForestGreen:Tomato:LightSeaGreen:RosyBrown:DarkOliveGreen:MediumVioletRed
| group names = Alabama:Alaska:Arizona:Arkansas:California:Colorado:Connecticut:Delaware:Florida:Georgia:Hawaii:Idaho:Illinois:Indiana:Iowa:Kansas:Kentucky:Louisiana:Maine:Maryland:Massachusetts
| x legends = 1920 : 1930 : 1940: 1950 : 1960 : 1970 : 1990 : 2000 : 2010
| units prefix = $
| units suffix = _billion
| stack = 1
}}
</pre>


{{ #invoke:Chart | bar chart
function barChart( frame )
| width = 800
local res = {}
| height = 550
local args = frame.args -- can be changed to frame:getParent().args
| group 1 = 1:2:3:4:5:4:3:2:1
local values, xlegends, colors, tooltips, yscales = {}, {}, {}, {} ,{}, {}, {}
| group 2 = 1:2:3:4:5:4:3:2:1
local groupNames, unitsSuffix, unitsPrefix, links = {}, {}, {}, {}
| group 3 = 1:2:3:4:5:4:3:2:1
local width, height, yticks, stack, delimiter = 500, 350, -1, false, args.delimiter or ':'
| group 4 = 1:2:3:4:5:4:3:2:1
local chartWidth, chartHeight, defcolor, scalePerGroup, accumulateTooltip
| group 5 = 1:2:3:4:5:4:3:2:1
| group 6 = 1:2:3:4:5:4:3:2:1
| group 7 = 1:2:3:4:5:4:3:2:1
| group 8 = 1:2:3:4:5:4:3:2:1
| group 9 = 1:2:3:4:5:4:3:2:1
| group 10 = 1:2:3:4:5:4:3:2:1
| group 11 = 1:2:3:4:5:4:3:2:1
| group 12 = 1:2:3:4:5:4:3:2:1
| group 13 = 1:2:3:4:5:4:3:2:1
| group 14 = 1:2:3:4:5:4:3:2:1
| group 15 = 1:2:3:4:5:4:3:2:1
| group 16 = 1:2:3:4:5:4:3:2:1
| group 17 = 1:2:3:4:5:4:3:2:1
| group 18 = 1:2:3:4:5:4:3:2:1
| group 19 = 1:2:3:4:5:4:3:2:1
| group 20 = 1:2:3:4:5:4:3:2:1
| group 21 = 1:2:3:4:5:4:3:2:1
| colors = Silver:Gray:Black:Red:Maroon:Yellow:Olive:Lime:Green:Aqua:Teal:Blue:Navy:Fuchsia:Purple:ForestGreen:Tomato:LightSeaGreen:RosyBrown:DarkOliveGreen:MediumVioletRed
| group names = Alabama:Alaska:Arizona:Arkansas:California:Colorado:Connecticut:Delaware:Florida:Georgia:Hawaii:Idaho:Illinois:Indiana:Iowa:Kansas:Kentucky:Louisiana:Maine:Maryland:Massachusetts
| x legends = 1920 : 1930 : 1940: 1950 : 1960 : 1970 : 1990 : 2000 : 2010
| units prefix = $
| units suffix = _billion
| stack = 1
}}




If there are many values, x legends can be diluted by using delimiters with nothing in between:
local numGroups, numValues
local scaleWidth


<pre>
function validate()
{{ #invoke:Chart | bar chart
function asGroups( name, tab, toDuplicate, emptyOK )
| group 1 = 1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30
if #tab == 0 and not emptyOK then
:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:53:54:55:56:57:58:59
error( "must supply values for " .. keywords[name] )
| units suffix = _Things
end
| group names = Some
if #tab == 1 and toDuplicate then
| x legends = ::::1940::::::::::1950::::::::::1960::::::::::1970::::::::::1980::::::::::1990::::
for i = 2, numGroups do tab[i] = tab[1] end
}}
end
</pre>
if #tab > 0 and #tab ~= numGroups then
error ( keywords[name] .. ' must contain the same number of items as the number of groups, but it contains ' .. #tab .. ' items and there are ' .. numGroups .. ' groups')
end
end


{{ #invoke:Chart | bar chart
-- do all sorts of validation here, so we can assume all params are good from now on.
| group 1 = 1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30:31:
-- among other things, replace numerical values with mw.language:parseFormattedNumber() result
32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:53:54:55:56:57:58:59
| units suffix = _Things
| group names = Some
| x legends = ::::1940::::::::::1950::::::::::1960::::::::::1970::::::::::1980::::::::::1990::::
}}


{{-}}


== Drawing Pie charts: "pie chart" ==
chartHeight = height - 80
numGroups = #values
numValues = #values[1]
defcolor = defcolor or 'blue'
colors[1] = colors[1] or defcolor
scaleWidth = scalePerGroup and 80 * numGroups or 100
chartWidth = width -scaleWidth
asGroups( 'unitsPrefix', unitsPrefix, true, true )
asGroups( 'unitsSuffix', unitsSuffix, true, true )
asGroups( 'colors', colors, true, true )
asGroups( 'groupNames', groupNames, false, false )
if stack and scalePerGroup then
error( string.format( 'Illegal settings: %s and %s are incompatible.', keyword.stack, keyword.scalePerGroup ) )
end
for gi = 2, numGroups do
if #values[gi] ~= numValues then error( keywords.group .. " " .. gi .. " does not have same number of values as " .. keywords.group .. " 1" ) end
end
if #xlegends ~= numValues then error( 'Illegal number of ' .. keywords.xlegend .. '. Should be exactly ' .. numValues ) end
end


===Parameters===
function extractParams()
function testone( keyword, key, val, tab )
i = keyword == key and 0 or key:match( keyword .. "%s+(%d+)" )
if not i then return end
i = tonumber( i ) or error("Expect numerical index for key " .. keyword .. " instead of '" .. key .. "'")
if i > 0 then tab[i] = {} end
for s in mw.text.gsplit( val, '%s*' .. delimiter .. '%s*' ) do
table.insert( i == 0 and tab or tab[i], s )
end
return true
end


{| class="wikitable"
for k, v in pairs( args ) do
|-
if k == keywords.width then
! parameter name !! what it does
width = tonumber( v )
|-
if not width or width < 200 then
|'''delimiter''' || string to delimit multiple values when given. default to colon ( : ). normally you do not want to touch this, it's provided for the off-chance you'll want to use colon as part of one of the parameters.
error( 'Illegal width value (must be a number, and at least 200): ' .. v )
|-
end
|'''radius''' ||number. The radius of the pie in pixels
elseif k == keywords.height then
|-
height = tonumber( v )
|'''slices''' || Tuples, in parenthesis. Use delimiter inside the tuple:
if not height or height < 200 then
( Value1 : Name1 : Color1 : Link1 ) ( Value2 : Name2 : Color2 : Link2 ) ...
error( 'Illegal height value (must be a number, and at least 200): ' .. v )
The values are numbers. The numbers can be integers or decimal fractions, or using the scientific notation: 7.24e6, 7,240,000, or 7240000.00 are all acceptable for 7 Million and 240 thousands.
end
elseif k == keywords.stack then stack = true
elseif k == keywords.yticks then yticks = tonumber(v) or -1
elseif k == keywords.scalePerGroup then scalePerGroup = true
elseif k == keywords.defcolor then defcolor = v
elseif k == keywords.accumulateTooltip then accumulateTooltip = not nulOrWhitespace( v )
elseif k == keywords.hideGroupLegends then hideGroupLegends = not nulOrWhitespace( v )
else
for keyword, tab in pairs( {
group = values,
xlegend = xlegends,
colors = colors,
tooltip = tooltips,
unitsPrefix = unitsPrefix,
unitsSuffix = unitsSuffix,
groupNames = groupNames,
links = links,
} ) do
if testone( keywords[keyword], k, v, tab )
then break
end
end
end
end
end


Names are strings. Colors are optional. you can use any [[Web colors]], such as "red" or "#FF0000". Up to 26 default colors are defined, but if your pie has more than 26 slices, you must define the colors of slice #27 and up. Links can be external or internal links, including linking to internal anchors and paragraphs in the same article, like so: <nowiki>[[Article|Tooltip]] for internal link, [[#Paragraph name|Tooltip]] for linking to an anchor in same article, or [http://example.org Tooltip] for external link.</nowiki>
function roundup( x ) -- returns the next round number: eg., for 30 to 39.999 will return 40, for 3000 to 3999.99 wil return 4000. for 10 - 14.999 will return 15.
|-
local ordermag = 10 ^ math.floor( math.log10( x ) )
|{{nowrap|'''slice n'''}}|| alternative syntax to "slices". n is the slice number, beginning with 1. make sure not to skip: if you define "slice 1", "slice 2", "slice 4", "slice 5"..., skipping slice 3, only the first two slices will be shown. this syntax is incompatible with "slices", i.e., they should not be used in conjunction in the same invocation. Using both "slices" and "slice n" in the same invocation will cause unpredictable results. The value is like a single "tuple" as explained above, but without the parenthesis:
local normalized = x / ordermag
<pre>
local top = normalized >= 1.5 and ( math.floor( normalized + 1 ) ) or 1.5
| slice 1 = Value1 : Name1 : Color1 : Link1
return ordermag * top, top, ordermag
| slice 2 = Value2 : Name2 : Color2 : Link2
end
| ...
</pre>
This syntax allows you to use parenthesis in names, links, and colors.
|-
|'''percent'''|| if used, the percentage of each slice will be calculated and added to the legend: so if you have two slices, like so: ( 1 : Younglings ) ( 3 : elders ), and use define "percent", the legends will become "Younglings: 1 (25%)" and "Elders: 3 (75%)", instead of simply "Younglings: 1" and "Elders: 3". Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
|-
|'''{{nowrap|units prefix}}''' || used in the legend. e.g., defining "units prefix=$", values will show as "$500" instead of "500" in the legends
|-
|'''{{nowrap|units suffix}}''' || ditto for units suffix. use, e.g. "Kg" so values will show as 88Kg instead of 88 in legend. underscore ("_") are replaced by spaces, to allow a space between the value and the suffix.
|-
|'''{{nowrap|hide group legends}}''' || Setting to true prevents displaying of the group legends under the chart. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
|}


===Examples===
function calcHeightLimits() -- if limits were passed by user, use them, otherwise calculate. for "stack" there's only one limet.
if stack then
local sums = {}
for _, group in pairs( values ) do
for i, val in ipairs( group ) do sums[i] = ( sums[i] or 0 ) + val end
end
local sum = math.max( unpack( sums ) )
for i = 1, #values do yscales[i] = sum end
else
for i, group in ipairs( values ) do yscales[i] = math.max( unpack( group ) ) end
end
for i, scale in ipairs( yscales ) do yscales[i] = roundup( scale * 0.9999 ) end
if not scalePerGroup then for i = 1, #values do yscales[i] = math.max( unpack( yscales ) ) end end
end


{{#invoke:Chart|pie chart
function tooltip( gi, i, val )
| radius = 150
if tooltips and tooltips[gi] and not nulOrWhitespace( tooltips[gi][i] ) then return tooltips[gi][i], true end
| slices =
local groupName = not nulOrWhitespace( groupNames[gi] ) and groupNames[gi] .. ': ' or ''
( 1000000 : Apples )
local prefix = unitsPrefix[gi] or unitsPrefix[1] or ''
( 2000000 : Bananas : gold)
local suffix = unitsSuffix[gi] or unitsSuffix[1] or ''
( 1440000 : Apricots )
return mw.ustring.gsub(groupName .. prefix .. mw.getContentLanguage():formatNum( tonumber( val ) or 0 ) .. suffix, '_', ' '), false
( 6.4e5 : Pears : : [[Pear|Pears]] )
end
( 750,000 : Pineapples )
| units suffix = _Tonne
| percent = true
}}


function calcHeights( gi, i, val )
local barHeight = math.floor( val / yscales[gi] * chartHeight + 0.5 ) -- add half to make it "round" instead of "trunc"
local top, base = chartHeight - barHeight, 0
if stack then
local rawbase = 0
for j = 1, gi - 1 do rawbase = rawbase + values[j][i] end -- sum the "i" value of all the groups below our group, gi.
base = math.floor( chartHeight * rawbase / yscales[gi] ) -- normally, and especially if it's "stack", all the yscales must be equal.
end
return barHeight, top - base
end


{{#invoke:Chart|pie chart
function groupBounds( i )
| radius = 150
local setWidth = math.floor( chartWidth / numValues )
| slices =
local setOffset = ( i - 1 ) * setWidth
( 1000000 : Apples )
return setOffset, setWidth
( 2000000 : Bananas : gold)
end
( 1440000 : Apricots )
( 6.4e5 : Pears : : [[Pear|Pears]] )
( 750,000 : Pineapples )
| units suffix = _Tonne
| percent = true
}}


function calcx( gi, i )
local setOffset, setWidth = groupBounds( i )
if stack or numGroups == 1 then
local barWidth = math.min( 38, math.floor( 0.8 * setWidth ) )
return setOffset + (setWidth - barWidth) / 2, barWidth
end
setWidth = 0.85 * setWidth
local barWidth = math.floor( 0.75 * setWidth / numGroups )
local left = setOffset + math.floor( ( gi - 1 ) / numGroups * setWidth )
return left, barWidth
end


function drawbar( gi, i, val, ttval )
if val == '0' then return end -- do not show single line (borders....) if value is 0, or rather, '0'. see talkpage


local color, tooltip, custom = colors[gi] or defcolor or 'blue', tooltip( gi, i, ttval or val )
local left, barWidth = calcx( gi, i )
local barHeight, top = calcHeights( gi, i, val )
-- borders so it shows up when printing
local style = string.format("position:absolute;left:%spx;top:%spx;height:%spx;min-width:%spx;max-width:%spx;background-color:%s;-webkit-print-color-adjust:exact;border:1px solid %s;border-bottom:none;overflow:hidden;",
left, top, barHeight-1, barWidth-2, barWidth-2, color, color)
local link = links[gi] and links[gi][i] or ''
local img = not nulOrWhitespace( link ) and mw.ustring.format( '[[File:Transparent.png|1000px|link=%s|%s]]', link, custom and tooltip or '' ) or ''
table.insert( res, mw.text.tag( 'div', { style = style, title = tooltip, }, img ) )
end


{{#invoke:chart|pie chart
|radius= 200
|units suffix = _Units
| slice 1 = 1 : 1
| slice 2 = 7 : 7
| slice 3 = 8 : 8
| slice 4 = 9 : 9
| slice 5 = 10 : 10
| slice 6 = 11 : 11
| slice 7 = 12 : 12
| slice 8 = 13 : 13
| slice 9 = 14 : 14
| slice 10 = 15 : 15
| slice 11 = 16 : 16
| slice 12 = 17 : 17
| slice 13 = 18 : 18
| slice 14 = 19 : 19
| slice 15 = 20 : 20
| slice 16 = 21 : 21
| slice 17 = 22 : 22
| slice 18 = 23 : 23
| slice 19 = 24 : 24
| slice 20 = 25 : 25
| slice 21 = 26 : 26
| slice 22 = 27 : 27
| slice 23 = 28 : 28
| slice 24 = 29 : 29
| slice 25 = 30 : 30
| slice 26 = 31 : 31
| percent = true
}}


{{#invoke:Chart|pie chart
function drawYScale()
|radius= 200
function drawSingle( gi, color, width, yticks, single )
|units suffix = _Units
local yscale = yscales[gi]
| slice 1 = 1 : 1
local _, top, ordermag = roundup( yscale * 0.999 )
| slice 2 = 7 : 7
local numnotches = yticks >= 0 and yticks or
| slice 3 = 8 : 8
(top <= 1.5 and top * 4
| slice 4 = 9 : 9
or top < 4 and top * 2
| slice 5 = 10 : 10
or top)
| slice 6 = 11 : 11
local valStyleStr =
| slice 7 = 12 : 12
single and 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;padding:0 2px'
| slice 8 = 13 : 13
or 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;left:3px;background-color:%s;color:white;font-weight:bold;text-shadow:-1px -1px 0 #000,1px -1px 0 #000,-1px 1px 0 #000,1px 1px 0 #000;padding:0 2px'
| slice 9 = 14 : 14
local notchStyleStr = 'position:absolute;height=1px;min-width:5px;top:%spx;left:%spx;border:1px solid %s;'
| slice 10 = 15 : 15
for i = 1, numnotches do
| slice 11 = 16 : 16
local val = i / numnotches * yscale
| slice 12 = 17 : 17
local y = chartHeight - calcHeights( gi, 1, val )
| slice 13 = 18 : 18
local div = mw.text.tag( 'div', { style = string.format( valStyleStr, width - 10, y - 10, color ) }, mw.getContentLanguage():formatNum( tonumber( val ) or 0 ) )
| slice 14 = 19 : 19
table.insert( res, div )
| slice 15 = 20 : 20
div = mw.text.tag( 'div', { style = string.format( notchStyleStr, y, width - 4, color ) }, '' )
| slice 16 = 21 : 21
table.insert( res, div )
end
| slice 17 = 22 : 22
end
| slice 18 = 23 : 23
| slice 19 = 24 : 24

| slice 20 = 25 : 25
if scalePerGroup then
| slice 21 = 26 : 26
local colWidth = 80
| slice 22 = 27 : 27
local colStyle = "position:absolute;height:%spx;min-width:%spx;left:%spx;border-right:1px solid %s;color:%s"
| slice 23 = 28 : 28
for gi = 1, numGroups do
| slice 24 = 29 : 29
local left = ( gi - 1 ) * colWidth
| slice 25 = 30 : 30
local color = colors[gi] or defcolor
| slice 26 = 31 : 31
table.insert( res, mw.text.tag( 'div', { style = string.format( colStyle, chartHeight, colWidth, left, color, color ) } ) )
| percent = true
drawSingle( gi, color, colWidth, yticks )
}}
table.insert( res, '</div>' )
end
else
drawSingle( 1, 'black', scaleWidth, yticks, true )
end
end

function drawXlegends()
local setOffset, setWidth
local legendDivStyleFormat = "position:absolute;left:%spx;top:10px;min-width:%spx;max-width:%spx;text-align:center;vertical-align:top;"
local tickDivstyleFormat = "position:absolute;left:%spx;height:10px;width:1px;border-left:1px solid black;"
for i = 1, numValues do
if not nulOrWhitespace( xlegends[i] ) then
setOffset, setWidth = groupBounds( i )
-- setWidth = 0.85 * setWidth
table.insert( res, mw.text.tag( 'div', { style = string.format( legendDivStyleFormat, setOffset + 5, setWidth - 10, setWidth - 10 ) }, xlegends[i] or '' ) )
table.insert( res, mw.text.tag( 'div', { style = string.format( tickDivstyleFormat, setOffset + setWidth / 2 ) }, '' ) )
end
end
end

function drawChart()
table.insert( res, mw.text.tag( 'div', { class = 'chart noresize', style = string.format( 'margin-top:1em;max-width:%spx;', width ) } ) )
table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;min-height:%spx;min-width:%spx;max-width:%spx;", height, width, width ) } ) )

table.insert( res, mw.text.tag( 'div', { style = string.format("float:right;position:relative;min-height:%spx;min-width:%spx;max-width:%spx;border-left:1px black solid;border-bottom:1px black solid;", chartHeight, chartWidth, chartWidth ) } ) )
local acum = stack and accumulateTooltip and {}
for gi, group in pairs( values ) do
for i, val in ipairs( group ) do
if acum then acum[i] = ( acum[i] or 0 ) + val end
drawbar( gi, i, val, acum and acum[i] )
end
end
table.insert( res, '</div>' )
table.insert( res, mw.text.tag( 'div', { style = string.format("position:absolute;height:%spx;min-width:%spx;max-width:%spx;", chartHeight, scaleWidth, scaleWidth, scaleWidth ) } ) )
drawYScale()
table.insert( res, '</div>' )
table.insert( res, mw.text.tag( 'div', { style = string.format( "position:absolute;top:%spx;left:%spx;width:%spx;", chartHeight, scaleWidth, chartWidth ) } ) )
drawXlegends()
table.insert( res, '</div>' )
table.insert( res, '</div>' )
createGroupList( res, groupNames, colors )
table.insert( res, '</div>' )
end

extractParams()
validate()
calcHeightLimits()
drawChart()
return table.concat( res, "\n" )
end

return {
['bar-chart'] = barChart,
[keywords.barChart] = barChart,
[keywords.pieChart] = pieChart,
}
--</source>

Revision as of 02:53, 7 August 2020

Module Chart exports two functions: bar chart and pie chart

Note - Template:Graph:Chart is an alternative template, that may be more suitable for your use case.

Drawing Bar charts: "bar chart"

Parameters

parameter name what it does
delimiter string to delimit multiple values when given. default to colon ( : ). normally you do not want to touch this, it's provided for the off-chance you'll want to use colon as part of one of the parameters.
width number. if provided, must be at least 200. default: 500
height number. if provided, must be at least 200. default: 350
group n (where "n" is a number. use "group 1", "group 2" etc. for as many groups as there are in the graph) the values to be charted. see below.
tooltip n tooltip to be associated with specific bar. If no tooltip for a specific bar is defined, and this bar has a link, then this link will be used as tooltip. Otherwise, the tooltip will be combined from the group name and the value, optionally with "units prefix" and "units suffix".
links n links to articles to be associated with specific bar
stack whether to stack the different groups on top of each other. do not specify to show bars side by side. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
tooltip value accumulation useful only with stack: when set to true, tooltip will show accumulated value of all blocks up to current one
colors the colors used to denote the various groups. should have exactly as many values as # of groups. can be given as standard html-recognized color names, or using #xxx or #xxxxxx notation.
x legends The legends for the X values. Wikicode, such as internal links or templates can be used.
hide group legends if set to true, group legends will not be shown below chart. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
scale per group set to use separate Y- scale for each group. leave empty to use one scale for all groups. incompatible with "stack". Note that even if some of the scales are exactly the same, they will be drawn separately when this setting is on. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
units prefix used in tooltip. e.g., $, so values will show as "$500" instead of "500" in the tooltip
units suffix ditto for units suffix. use, e.g. "Kg" so values will show as 88Kg instead of 88 in tooltip. underscore ("_") are replaced by spaces, to allow a space between the value and the suffix.
group names names of different groups
y tick marks number of tick marks on the y axis. if the value is negative or omitted, the module will attempt to automatically calculate a sensible number of tick marks.

Examples

Basic

{{ #invoke:Chart | bar chart
| group 1 = 40 : 50 : 60 : 20
| group 2 = 20 : 60 : 12 : 44
| group 3 = 55 : 14 : 33 : 5
| links 1 = Apple : McCintosh : Golden delicious
| links 2 = Banana : Apricot : Peach
| links 3 = Orange : Pear : Bear
| tooltip 2 = tooltip 1 : tooltip 2 : tooltip 3 : tooltip 4
| colors = green : yellow : orange
| group names = Apple : Banana : Orange
| x legends = Before : During : After : Post mortem
}}


tooltip 1
tooltip 2
tooltip 3
10
20
30
40
50
60
Before
During
After
Post mortem
  •   Apple
  •   Banana
  •   Orange


Stacked

Here is the same graph, with more modest height and width, using "stack", and adding "units suffix" for good measure: 

{{ #invoke:Chart | bar chart
| height = 250
| width = 300
| stack = 1
| group 1 = 40 : 50 : 60 : 20
| group 2 = 20 : 60 : 12 : 44
| group 3 = 55 : 14 : 33 : 5
| colors = green : yellow : orange
| group names = Apple : Banana : Orange
| units suffix = Kg
| x legends = Before : During : After : Post mortem
}}
25
50
75
100
125
150
Before
During
After
Post mortem
  •   Apple
  •   Banana
  •   Orange


Scale per group

This option has been disabled. It was rarely used and broke in the last code update. Here is an example with large number of groups - mainly to test how it looks with large number of legends: 

{{ #invoke:Chart | bar chart
| width = 800
| height = 550
| group 1 = 1:2:3:4:5:4:3:2:1
| group 2 = 1:2:3:4:5:4:3:2:1
| group 3 = 1:2:3:4:5:4:3:2:1
| group 4 = 1:2:3:4:5:4:3:2:1
| group 5 = 1:2:3:4:5:4:3:2:1
| group 6 = 1:2:3:4:5:4:3:2:1
| group 7 = 1:2:3:4:5:4:3:2:1
| group 8 = 1:2:3:4:5:4:3:2:1
| group 9 = 1:2:3:4:5:4:3:2:1
| group 10 = 1:2:3:4:5:4:3:2:1
| group 11 = 1:2:3:4:5:4:3:2:1
| group 12 = 1:2:3:4:5:4:3:2:1
| group 13 = 1:2:3:4:5:4:3:2:1
| group 14 = 1:2:3:4:5:4:3:2:1
| group 15 = 1:2:3:4:5:4:3:2:1
| group 16 = 1:2:3:4:5:4:3:2:1
| group 17 = 1:2:3:4:5:4:3:2:1
| group 18 = 1:2:3:4:5:4:3:2:1
| group 19 = 1:2:3:4:5:4:3:2:1
| group 20 = 1:2:3:4:5:4:3:2:1
| group 21 = 1:2:3:4:5:4:3:2:1
| colors = Silver:Gray:Black:Red:Maroon:Yellow:Olive:Lime:Green:Aqua:Teal:Blue:Navy:Fuchsia:Purple:ForestGreen:Tomato:LightSeaGreen:RosyBrown:DarkOliveGreen:MediumVioletRed
| group names = Alabama:Alaska:Arizona:Arkansas:California:Colorado:Connecticut:Delaware:Florida:Georgia:Hawaii:Idaho:Illinois:Indiana:Iowa:Kansas:Kentucky:Louisiana:Maine:Maryland:Massachusetts
| x legends = 1920 : 1930 : 1940: 1950 : 1960 : 1970 : 1990 : 2000 : 2010
| units prefix = $
| units suffix = _billion
| stack = 1
}}
25
50
75
100
125
150
1920
1930
1940
1950
1960
1970
1990
2000
2010
  •   Alabama
  •   Alaska
  •   Arizona
  •   Arkansas
  •   California
  •   Colorado
  •   Connecticut
  •   Delaware
  •   Florida
  •   Georgia
  •   Hawaii
  •   Idaho
  •   Illinois
  •   Indiana
  •   Iowa
  •   Kansas
  •   Kentucky
  •   Louisiana
  •   Maine
  •   Maryland
  •   Massachusetts


If there are many values, x legends can be diluted by using delimiters with nothing in between: 

{{ #invoke:Chart | bar chart
| group 1 = 1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30
:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:53:54:55:56:57:58:59
| units suffix = _Things
| group names = Some
| x legends = ::::1940::::::::::1950::::::::::1960::::::::::1970::::::::::1980::::::::::1990::::
}}
10
20
30
40
50
60
1940
1950
1960
1970
1980
1990

Drawing Pie charts: "pie chart"

Parameters

parameter name what it does
delimiter string to delimit multiple values when given. default to colon ( : ). normally you do not want to touch this, it's provided for the off-chance you'll want to use colon as part of one of the parameters.
radius number. The radius of the pie in pixels
slices Tuples, in parenthesis. Use delimiter inside the tuple: 
( Value1 : Name1 : Color1 : Link1  ) ( Value2 : Name2 : Color2 : Link2 ) ...

The values are numbers. The numbers can be integers or decimal fractions, or using the scientific notation: 7.24e6, 7,240,000, or 7240000.00 are all acceptable for 7 Million and 240 thousands.

Names are strings. Colors are optional. you can use any Web colors, such as "red" or "#FF0000". Up to 26 default colors are defined, but if your pie has more than 26 slices, you must define the colors of slice #27 and up. Links can be external or internal links, including linking to internal anchors and paragraphs in the same article, like so: [[Article|Tooltip]] for internal link, [[#Paragraph name|Tooltip]] for linking to an anchor in same article, or [http://example.org Tooltip] for external link.

slice n alternative syntax to "slices". n is the slice number, beginning with 1. make sure not to skip: if you define "slice 1", "slice 2", "slice 4", "slice 5"..., skipping slice 3, only the first two slices will be shown. this syntax is incompatible with "slices", i.e., they should not be used in conjunction in the same invocation. Using both "slices" and "slice n" in the same invocation will cause unpredictable results. The value is like a single "tuple" as explained above, but without the parenthesis: 
 | slice 1 = Value1 : Name1 : Color1 : Link1
 | slice 2 = Value2 : Name2 : Color2 : Link2
 | ...

This syntax allows you to use parenthesis in names, links, and colors.

percent if used, the percentage of each slice will be calculated and added to the legend: so if you have two slices, like so: ( 1 : Younglings ) ( 3 : elders ), and use define "percent", the legends will become "Younglings: 1 (25%)" and "Elders: 3 (75%)", instead of simply "Younglings: 1" and "Elders: 3". Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
units prefix used in the legend. e.g., defining "units prefix=$", values will show as "$500" instead of "500" in the legends
units suffix ditto for units suffix. use, e.g. "Kg" so values will show as 88Kg instead of 88 in legend. underscore ("_") are replaced by spaces, to allow a space between the value and the suffix.
hide group legends Setting to true prevents displaying of the group legends under the chart. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.

Examples

Apples: 1,000,000 Tonne (17.2%)Bananas: 2,000,000 Tonne (34.3%)Apricots: 1,440,000 Tonne (24.7%)PearsPineapples: 750,000 Tonne (12.9%)
  •   Apples: 1,000,000 Tonne (17.2%)
  •   Bananas: 2,000,000 Tonne (34.3%)
  •   Apricots: 1,440,000 Tonne (24.7%)
  •   Pears: 640,000 Tonne (11.0%)
  •   Pineapples: 750,000 Tonne (12.9%)


Apples: 1,000,000 Tonne (17.2%)Bananas: 2,000,000 Tonne (34.3%)Apricots: 1,440,000 Tonne (24.7%)PearsPineapples: 750,000 Tonne (12.9%)
  •   Apples: 1,000,000 Tonne (17.2%)
  •   Bananas: 2,000,000 Tonne (34.3%)
  •   Apricots: 1,440,000 Tonne (24.7%)
  •   Pears: 640,000 Tonne (11.0%)
  •   Pineapples: 750,000 Tonne (12.9%)



1: 1 Units (0.2%)7: 7 Units (1.5%)8: 8 Units (1.7%)9: 9 Units (1.9%)10: 10 Units (2.1%)11: 11 Units (2.3%)12: 12 Units (2.5%)13: 13 Units (2.7%)14: 14 Units (2.9%)15: 15 Units (3.2%)16: 16 Units (3.4%)17: 17 Units (3.6%)18: 18 Units (3.8%)19: 19 Units (4.0%)20: 20 Units (4.2%)21: 21 Units (4.4%)22: 22 Units (4.6%)23: 23 Units (4.8%)24: 24 Units (5.0%)25: 25 Units (5.3%)26: 26 Units (5.5%)27: 27 Units (5.7%)28: 28 Units (5.9%)29: 29 Units (6.1%)30: 30 Units (6.3%)31: 31 Units (6.5%)
  •   1: 1 Units (0.2%)
  •   7: 7 Units (1.5%)
  •   8: 8 Units (1.7%)
  •   9: 9 Units (1.9%)
  •   10: 10 Units (2.1%)
  •   11: 11 Units (2.3%)
  •   12: 12 Units (2.5%)
  •   13: 13 Units (2.7%)
  •   14: 14 Units (2.9%)
  •   15: 15 Units (3.2%)
  •   16: 16 Units (3.4%)
  •   17: 17 Units (3.6%)
  •   18: 18 Units (3.8%)
  •   19: 19 Units (4.0%)
  •   20: 20 Units (4.2%)
  •   21: 21 Units (4.4%)
  •   22: 22 Units (4.6%)
  •   23: 23 Units (4.8%)
  •   24: 24 Units (5.0%)
  •   25: 25 Units (5.3%)
  •   26: 26 Units (5.5%)
  •   27: 27 Units (5.7%)
  •   28: 28 Units (5.9%)
  •   29: 29 Units (6.1%)
  •   30: 30 Units (6.3%)
  •   31: 31 Units (6.5%)
1: 1 Units (0.2%)7: 7 Units (1.5%)8: 8 Units (1.7%)9: 9 Units (1.9%)10: 10 Units (2.1%)11: 11 Units (2.3%)12: 12 Units (2.5%)13: 13 Units (2.7%)14: 14 Units (2.9%)15: 15 Units (3.2%)16: 16 Units (3.4%)17: 17 Units (3.6%)18: 18 Units (3.8%)19: 19 Units (4.0%)20: 20 Units (4.2%)21: 21 Units (4.4%)22: 22 Units (4.6%)23: 23 Units (4.8%)24: 24 Units (5.0%)25: 25 Units (5.3%)26: 26 Units (5.5%)27: 27 Units (5.7%)28: 28 Units (5.9%)29: 29 Units (6.1%)30: 30 Units (6.3%)31: 31 Units (6.5%)
  •   1: 1 Units (0.2%)
  •   7: 7 Units (1.5%)
  •   8: 8 Units (1.7%)
  •   9: 9 Units (1.9%)
  •   10: 10 Units (2.1%)
  •   11: 11 Units (2.3%)
  •   12: 12 Units (2.5%)
  •   13: 13 Units (2.7%)
  •   14: 14 Units (2.9%)
  •   15: 15 Units (3.2%)
  •   16: 16 Units (3.4%)
  •   17: 17 Units (3.6%)
  •   18: 18 Units (3.8%)
  •   19: 19 Units (4.0%)
  •   20: 20 Units (4.2%)
  •   21: 21 Units (4.4%)
  •   22: 22 Units (4.6%)
  •   23: 23 Units (4.8%)
  •   24: 24 Units (5.0%)
  •   25: 25 Units (5.3%)
  •   26: 26 Units (5.5%)
  •   27: 27 Units (5.7%)
  •   28: 28 Units (5.9%)
  •   29: 29 Units (6.1%)
  •   30: 30 Units (6.3%)
  •   31: 31 Units (6.5%)
Retrieved from "https://en.wikipedia.org/w/index.php?title=Module:Chart/doc&oldid=971594980"