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

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Leonard
Leonard 2015-1-27
评论： 俊鹏 陈 2022-6-21
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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采纳的回答

Sean de Wolski
Sean de Wolski 2015-1-27
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';
  1 个评论
俊鹏 陈
俊鹏 陈 2022-6-21
I'm sorry to bother you！
What if you wanted my graphics to have a regular gradient of color, like a rainbow. Rather than a single color.It could be like this picture, or even more beautiful.
Looking forward to your reply.

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更多回答（1 个）

Image Analyst
Image Analyst 2015-1-27
Not sure what you're doing, but a huge number of MATLAB graphics functions have a 'Color' input parameter. Check for that.
  1 个评论
Leonard
Leonard 2015-1-27
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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