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

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?

Answer 1

[Sean de Wolski]

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';

[俊鹏 陈]

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.

Answer 2

[Image Analyst]

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

[Leonard]

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!