How to select best x-axis values correspond to curve knee y-axis values
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I'm plotting this curves shown below, and I want to extract the best x-axis values correspond to curve knee y-axis values. My target is , for each curve, to pick the smallest x-axis value where the y-axis values seem to start to flatten out.
see this figure.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/201772/image.png)
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KSSV
2019 年 1 月 28 日
Try fitting a striaght line for the requrired points using polyfit and check for devaitaion of points from the line and pick the required points.
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