Extracting closed contours of streamfunction

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CODER 2021-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/1594629-extracting-closed-contours-of-streamfunction

编辑： CODER 2021-11-25

I have 2D streamfunction(x,y). I would like to know how can I extract closed contour of streamfunction only without providing threshold. And obtain the rough radius of the circle with centre

Thanking you

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KSSV 2021-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/1594629-extracting-closed-contours-of-streamfunction#answer_839154

Did you try this? https://in.mathworks.com/help/matlab/ref/streamline.html

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KSSV 2021-11-24

You have any specific line/ region to extract?

CODER 2021-11-24

编辑：CODER 2021-11-25

Yes I would like to extract only those circular streamfunction contour which are indicated. Basically it will be having three circular contours only and the contours which are not circular should be removed.Applying theshold would produce contour that are not circular so I avoid threshold.

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