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Suppose I have a data set

data={{0,0,-1},{0,1,-0.5},{1,1,0},{2,1,0.5},{2,2,1}};

where the first two coordinates are x and y values, and the third is input for the color gradient function

crgrad[x_] := Blend[{{-1, Blue},{0, Black}, {1, Red}}, x];

What is the correct way to plot the data points and have each point be its corresponding color? I have already tried

dataPlt = Graphics[{Point[{#1, #2}], ColorFunction -> (crgrad[#3])} & @@@ data];

I also want to incorporate

ColorFunctionScaling -> False

Thanks!

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  • $\begingroup$ Graphics[{crgrad[#3], Point[{#1, #2}]} & @@@ data]? $\endgroup$ – kglr Mar 29 '16 at 5:10
  • $\begingroup$ Thanks for the reply, but that also does not work. $\endgroup$ – S2167 Mar 29 '16 at 6:04
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If you do not have to use ColorFunction, you can use

Graphics[{crgrad[#3], PointSize[.05], Point[{#1, #2}]} & @@@ data]

Mathematica graphics

or

Graphics[{PointSize[.05], Point[{#1, #2}, VertexColors -> crgrad[#3]]} & @@@ data]

Mathematica graphics

or

ListPlot[Style[{#, #2}, crgrad[#3], PointSize[.05]] & @@@ data, 
 Axes -> False, PlotRangePadding -> .2, AspectRatio -> 1]

Mathematica graphics

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  • $\begingroup$ For some reason I could not get the method to work after reading your comment, but it now works brilliantly. Thank you. $\endgroup$ – S2167 Mar 29 '16 at 7:07
  • $\begingroup$ @S2167, thank you for the accept. $\endgroup$ – kglr Mar 29 '16 at 8:31

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