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Glyph in Heatmap Display

Hi,

is there a way to render something more sophisticated in the heatmap display, such as a glyph.

The glyph would be positioned in the corresponding cell and would allow to see more values at the same time.

I'm thinking about an inner-outer rectangle glyph such as here (left most part)

https://www.ukp.tu-darmstadt.de/fileadmin/user_upload/Group_UKP/Visualization/Vis-Streifen.png

Thanks Michael

1 REPLY 1
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XanGregg
Staff

Re: Glyph in Heatmap Display

I was thinking it's not possible because Graph Builder can only have one color variable and doesn't overlay heat maps, but then I tried combining square markers with a heat map, and it creates the desired effect. I'm not sure if it works perceptually, but you can experiment with different size/marker combinations to see if can get your message across.

The main trick is to assign colors to the rows (with Rows > Color or Mark by Column) and tell the Points element in Graph Builder to ignore the variable in the color role (Properties > Points > Variables > untick C2) so only the heat map element uses it. Script below.

8066_doubleheat.png


New Table( "double heat",


  New Column( "X1", Nominal, Set Values( Mod( 0 :: 59, 6 ) + 1 ) ),


  New Column( "X2", Nominal, Set Values( Floor( (0 :: 59) / 6 ) + 1 ) ),


  New Column( "S1", Formula( Random Uniform() ) ),


  New Column( "C1", Formula( Random Uniform() ) ),


  New Column( "C2", Formula( :C1 + Random Normal() / 5 ) )


);


Current Data Table() << Run Formulas();




// change the rows to use square markers (could be anything)


For Each Row( Row State( Row() ) = Marker State( "Filled Square" ) );




// Color each row marker based on column C1


Current Data Table() << Color by Column( :C1, Color Theme( "Blue to Gray to Red" ) );




Graph Builder(


  Size( 257, 422 ), Show Control Panel( 0 ),


  Variables( X( :X1 ), Y( :X2 ), Color( :C2 ), Size( :S1 ) ),


  Elements(


  Heatmap( X, Y, Legend( 13 ) ),


  Points( X, Y, Color( 0 ), Legend( 12 ) )


  ),


  SendToReport( Dispatch( {}, "400", ScaleBox,


  {Legend Model( 12, Properties( 0, {Marker Size( 6 )} ) )}


  ) )


)










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