MATLAB Answers

Leonard
1

How can I change the color of an alphaShape object when using plot?

Asked by Leonard
on 27 Jan 2015
Latest activity Answered by Sean de Wolski
on 27 Jan 2015
I have a 3-D object which I've converted to a very nice looking alphaShape object after getting the PixelIdxList and using ind2sub to get the coordinate of each voxel.
As awesome as they look, I really really need to change the color of some of the objects to anything other than the default green. Any idea on how to change the color?

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2 Answers

Answer by Sean de Wolski
on 27 Jan 2015
 Accepted Answer

You can grab the handle to the patch objects making up the alpha shape as the output from plot and then change whatever properties of it you want:
data = randn(100,3);
as = alphaShape(data);
h = plot(as);
h.FaceColor = 'b';

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Answer by Image Analyst
on 27 Jan 2015

Not sure what you're doing, but a huge number of MATLAB graphics functions have a 'Color' input parameter. Check for that.

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Thank you for your response. I did check for these features but it did not work in the traditional sense:
plot(shape,'Color',[0.5,0.5,0.5])
Instead, I went into the plot.m for alphaShapes, and noticed that there is a default color called "yellowgreen". I am able to copy-paste this entire file, save and rename it, and adjust the color to my liking. Using "hold on" and these steps, I should be able to achieve the desired result! Will update here if it works!

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