Profile Picture

Heatmap palette

Posted By Lennart Bossér 7 Years Ago
Author
Message
Lennart Bossér
Problem Posted 7 Years Ago
View Quick Profile
Forum Newbie

Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)

Group: Forum Members
Last Active: 7 Years Ago
Posts: 5, Visits: 37
Hello,

How many colors can be handled with m_heatmap.Palette.AutoPaletteColors?

It seems to me that about the 8 first colours are used regardless of the size of the palette.
See excerpt of code below



  private byte[,] swecadecol = {{0, 0, 102},  {0, 0, 119},  {0, 0, 136},  {0, 0, 153},  {0, 0, 170},
             {0, 0, 187},  {0, 0, 204},  {0, 0, 221},  {0, 0, 238},  {0, 38, 225},
             {0, 60, 200},  {0, 137, 221}, {0, 135, 219}, {0, 181, 205}, {0, 223, 120},
             {0, 255, 128}, {0, 255, 45},  {84, 255, 84}, {85, 255, 85}, {119, 255, 119},
             {151, 255, 129}, {136, 255, 136}, {153, 255, 153}, {187, 255, 187}, {221, 255, 221},
             {255, 255, 255}, {255, 255, 187}, {255, 255, 153}, {255, 255, 119}, {255, 255, 85},
             {255, 255, 51}, {255, 255, 17}, {243, 240, 0}, {245, 243, 0}, {239, 197, 158},
             {234, 179, 128}, {228, 159, 97}, {223, 140, 66}, {255, 119, 119}, {255, 85, 85},
             {255, 68, 68}, {255, 34, 34}, {255, 17, 17}, {238, 0, 0},  {221, 0, 0},
             {187, 0, 0},  {170, 0, 0},  {136, 0, 0},  {102, 0, 0},  {68, 0, 0},
             {51, 0, 0}};
  private NHeatMapSeries m_heatmap = new NHeatMapSeries();
   m_heatmap.Palette.SmoothPalette = true;
   NArgbColorValue[] newcolors = new NArgbColorValue[51];
   for (int i = 0; i < 51; i++)
   {
      newcolors[i] = new NArgbColorValue(255, swecadecol[i, 0], swecadecol[i, 1], swecadecol[i, 2]);
   }
   m_heatmap.Palette.AutoPaletteColors = newcolors;

    ...



I expected to see the whole range of colours from dark blue via white to dark red.
But I only see dark shades of blue.

best regards,
Lennart


Nevron Support
Posted 7 Years Ago
View Quick Profile
Supreme Being

Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)

Group: Forum Members
Last Active: Last Year
Posts: 3,039, Visits: 3,746
Hi Lennart,
You also need to tell the palette to use the same number of steps as the autocolors - for example in your case:
m_heatmap.Palette.PaletteSteps = 51;

Let us know if you meet any problems.


Best Regards,
Nevron Support Team



Lennart Bossér
Posted 7 Years Ago
View Quick Profile
Forum Newbie

Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)Forum Newbie (0 reputation)

Group: Forum Members
Last Active: 7 Years Ago
Posts: 5, Visits: 37
Thank you very much, that helped.
Where do I find such information in the documentation? Sorry to bother you all the time :-)

By the way, it seems to work even better if the number of palette steps is one less than the number of colours,
in this case m_heatmap.Palette.PaletteSteps = 50;

Best regard,
Lennart



Nevron Support
Posted 7 Years Ago
View Quick Profile
Supreme Being

Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)Supreme Being (4,329 reputation)

Group: Forum Members
Last Active: Last Year
Posts: 3,039, Visits: 3,746
Hi Lennart,
Sometimes not all features / properties are well documented or in this case the combination of properties, because it is a very large control. We try to improve the documentation constantly though when we find discrepancies or if something is incorrect. Also the example sometimes are a better source to learn the API. If you don't find something or something is not quite clear please let us know Smile.

Best Regards,
Nevron Support Team





Similar Topics


Reading This Topic