How can I plot a filled convex shape?

Question

Canberk Suat Gurel 2018-2-25

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https://ww2.mathworks.cn/matlabcentral/answers/384654-how-can-i-plot-a-filled-convex-shape

评论： Image Analyst 2018-2-25

采纳的回答： Star Strider

Is it possible to plot a filled convex shape?

This is what I want to plot:

This is what I have plotted using the rectangle command but it does not work with unordinary shapes.

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Answer 1

Star Strider 2018-2-25

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在 MATLAB Online 中打开

This works for me with both fill and patch in R2017b:

x = [120 158 165 188 198 145];
y = [ 55  51  89  51  14  14];
figure(1)
fill(x, y, [0.1 0.5 0.9])
axis([100  200    0  150])
axis equal
figure(2)
patch(x, y, [0.1 0.5 0.9])
axis([100  200    0  150])
axis equal

The patch function usually closes the curve on its own. If it doesn’t, close it yourself:

patch([x x(1)], [y y(1)], [0.1 0.5 0.9])

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Answer 2

Image Analyst 2018-2-25

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For analytical data (graph points) you can do what Star says.

If you have digital images, look at the functions imfill(), bwconvhull(), and poly2mask(). They're all slightly different depending on what you're starting with and what you want to end up with.

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Image Analyst 2018-2-25

I don't think Canberk cares about your question - it doesn't answer or address his problem at all - so post your question in a new, completely separate post, not here.

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