find intersection between horizontal line and a set of (x,y) data and find the length of intersected line segments above the given (x,y) data

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Sanat Karmacharya 2020-9-30

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https://ww2.mathworks.cn/matlabcentral/answers/602350-find-intersection-between-horizontal-line-and-a-set-of-x-y-data-and-find-the-length-of-intersected

评论： Ameer Hamza 2020-10-1

采纳的回答： Ameer Hamza

I have a river cross section data as a set of (x,y) points.

I have to find the width of the water surface for given water level elevation.

For example, the river cross section data joined with straight lines (red line) is as shown in the attached image and blue line is the given water surface elevation.

The water surface elevation intersects the cross section at four points here (it could be any number ranging from 2 to n)

What i need to do is to find the lengths of the intersected line segments representing water surface which are above the cross section.

Need some quick ideas.

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Ameer Hamza 2020-9-30

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/602350-find-intersection-between-horizontal-line-and-a-set-of-x-y-data-and-find-the-length-of-intersected#answer_502780

Check this FEX package: https://www.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections

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Sanat Karmacharya 2020-10-1

Thank you Ameer. Your answer was pretty helpful.

Ameer Hamza 2020-10-1

I am glad to be of help!

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