Find all y values for single x in polyshape plot

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Yehor Zhyliaiev
Yehor Zhyliaiev 2022-4-20
评论： Jon 2022-4-22
I whould like to somehow get all y values that correspond to a given x.
pgon = polyshape([0 0 1 1],[1 0 0 1])
plot(pgon)
Expected functionality:
y = findYbyX(pgon, 0.2);
Output:
y = [0, 1]

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采纳的回答

Jon
Jon 2022-4-20
编辑：Jon 2022-4-20
You can use the intersect function for this, for example
pgon = polyshape([0 0 1 1],[1 0 0 1])
endpoints = intersect(pgon,[0.2 0;0.2 10])
y = endpoints(:,2); % just keep the y values of the intersecting line segment

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