7 Apr
2013
7 Apr
'13
5:19 p.m.
could you send a screenshots of the results?
Stef
On Apr 7, 2013, at 4:43 PM, Ben Coman <btc(a)openInWorld.com> wrote:
Ben Coman wrote:
I have two sets of data X & Y, which for all
combinations of (x@y) I calculate a third value z, which ends up represented as a
collection of "points associated with a value eg (x(a)y)->z)."
I'd like to chart this as a heat map - very much like a Scatterplot but each point
'(x@y)' has its pixel color dependent on 'z'.
Any ideas how to go about this with EyeSee ?
cheers -ben
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I worked this out. Just for the archives, here it is...
where chartData is a collection of associations of the form (x@y)->z ...
minCost := (chartData collect: [ :x | x value ]) min.
maxCost := (chartData collect: [ :x | x value ]) max.
costRange := maxCost - minCost.
colorBlock := [ :z| | colorIndex | colorIndex := (((z- 1 - minCost) / (costRange ))
* (colorChoices size) ) asInteger + 1 ] .
colorChoices := ((Color green darkShades: 4) reverse allButLast: 1)
asOrderedCollection . "Greater differentiation near optimum"
colorChoices addAll: ((Color blue darkShades: 10) reverse allButLast: 3 )
asOrderedCollection . "Remove blacks from the middle"
colorChoices addAll: ( (Color red darkShades: 10) reverse ) asOrderedCollection.
"Fade to black"
colorDict := Dictionary keys: (1 to: colorChoices size) asOrderedCollection values:
colorChoices. renderer compositeDiagram
add: (costBenefitDiagram := ESScatterPlot new) .
costBenefitDiagram models: chartData ;
x: [ :data | data key x ] ;
y: [ :data | data key y ] ;
color: [ :data | colorBlock value: data value ] ; "data value is
z"
colorDict: colorDict ;
valueAxis ;
xAxisLabel: 'mm2' ;
yAxisLabel: 'kW' ;
rotatedLabels: true ;
addXDecorator: ESValueLabelDecorator new .
cheers -ben
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