Delete points selected on a plot

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Luke C 2017-9-2

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https://ww2.mathworks.cn/matlabcentral/answers/354976-delete-points-selected-on-a-plot

评论： Star Rats 2019-10-9

Is it possible to select a point on a plot and then delete that point from the original data source? For example in the attached image i'd like to be able to select 1 of the 3 asterisk points in red and then delete them from their source.

I thought about using ginput to select the points and then delete the corresponding point in the source array, but ginput allows you to click any point on the plot.

Would the best solution be to use ginput and then use pdist to find the distance between the selected points and the available points and delete the closest?

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dpb 2017-9-2

How did you determine the marked points are the ones to delete and to highlight?

As you note ginput allows to select any point; you'll have to supply whatever logic it is that accepts/rejects the user's selection depending on just what it is that is the intent in doing so.

Luke C 2017-9-2

The marked points are determined by finding local minima/maxima along the boundary. The need to be able to select and delete points is because the boundaries can occasionally have turns along them resulting in a point being marked, where only corners are required.

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