Open a jpg picture for each data point by clicking on the plot

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H R 2018-12-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/436762-open-a-jpg-picture-for-each-data-point-by-clicking-on-the-plot

回答： Walter Roberson 2018-12-21

Hi there.

I have a simple 2D data set (x,y). Each point (xi,yi,i) (i=0,..n) corresponds to a JPG picture. The JPG names are (0.jpg, 1.jpg,...).

I would like to be able to open the corresponding JPG image, when I click on the 2D plot (i.e. the closest data point to the place I am clicking). How can I do that?

Thank you.

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Answer 1

Walter Roberson 2018-12-21

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https://ww2.mathworks.cn/matlabcentral/answers/436762-open-a-jpg-picture-for-each-data-point-by-clicking-on-the-plot#answer_353438

ginput() to get x and y coordinates . round or ceil to get integers and cross check that they are within range. use them to index into an array of image file numbers . sprintf to get a file name . read the corresponding file and display it in the appropriate place .

Just remember that x coordinates correspond to horizontal distance not to vertical distance .