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  change color palette of contour chart
Posted by Vitaly on Sep-06-2013 22:40
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Hello,
I am trying to create a contour chart representing soil moisture in the field.
Normally, colors of contours change from blue to red in ascending order. I need it in reverse. The lowest value should be red and the greatest one should be dark blue. My values change in the range from 0% (red) to 40% (dark blue). I think I need to use Layer.yZoneColor() but not sure how to do it.

  Re: change color palette of contour chart
Posted by Peter Kwan on Sep-07-2013 00:31
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Hi Vitaly,

The colors can be configured using ColorAxis.setColorGradient. For example, (in C#/Java);

//from red 0xff0000 to dark blue 0x000088
int[] colors = {0xff0000, 0x000088};

ContourLayer layer = c.addContourLayer(..........);
layer.colorAxis().setColorGradient(false, colors);

You can set more color stops along the color gradient if you like:

//from red, to cyan, to dark blue
int[] colors = {0xff0000, 0x6699ff, 0x000088};
layer.colorAxis().setColorGradient(false, colors);

Hope this can help.

Regards
Peter Kwan

  Re: change color palette of contour chart
Posted by Vitaly on Sep-07-2013 15:17
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Thank you Peter.
Exactly what I need.
regards
Vitaly