problem with colorbar in using scatter3

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Hi. I have a table called "damage" with four collumns "wind", "I", "derate", "Index4". I am using the following code to plot "Index4" vs. "wind", "I" and "derate":
s = scatter3(damage,'wind','I','derate','filled','ColorVariable','Index4'); s.SizeData = 100;colorbar
but I get the following error:
Error using scatter3 (line 57)
Color must be one RGB triplet, an m-by-3 matrix of RGB triplets with one color per scatter point, or an m-by-1 vector with one
value per scatter point.
Any feedback is very much appreciated.

Accepted Answer

Cris LaPierre
Cris LaPierre on 6 Sep 2022
First, the error is not related to colorbar. It is an error occurring with scatter3, specifically the format of your ColorVariable.
I can duplicate the error by making Index4 anything but what is expected (indicated in the error message). The fix is to make Index4 one of the accepted inputs (described here: https://www.mathworks.com/help/matlab/ref/scatter3.html#mw_0ec595ed-40a4-4191-be63-534236f0fb9e)
% How I can recreate the error message: Index4 is not mx3, 1x3, nor mx1
wind = [30 40 50]';
I = [1 2 3]';
derate = [5 6 5]';
Index4 = [1 3 7;2 5 9]';
damage = table(wind,I,derate,Index4)
damage = 3×4 table
wind I derate Index4 ____ _ ______ ______ 30 1 5 1 2 40 2 6 3 5 50 3 5 7 9
s = scatter3(damage,'wind','I','derate','filled','ColorVariable','Index4');
Error using scatter3
Color must be one RGB triplet, an m-by-3 matrix of RGB triplets with one color per scatter point, or an m-by-1 vector with one value per scatter point.
s.SizeData = 100;
colorbar
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