Adding parameter to file name string when saving a figure as a jpeg

Question

Luke 2014-9-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/154271-adding-parameter-to-file-name-string-when-saving-a-figure-as-a-jpeg

回答： Muaz Khan 2017-3-2

I'm running code on different point clouds (each with their own name) to produce graphs, and the name of the point cloud is an input parameter in my function. I want the graph produce to be switched from a fig to a jpg and for the name of the file to include the point cloud name. Currently the code is running and saving as a jpg and overwriting the current jpg each time (meaning i have to go in and change the filename before running the code again). I have set the file name to be a string with the variable included to then save the figure as a jpg, but this doesn't seem to work. I've also used saveas(plt, sprintf(''),''jpg) where plt is what ive set my plot to, and this doesnt work either.

Cheers!

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Answer 1

Iain 2014-9-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/154271-adding-parameter-to-file-name-string-when-saving-a-figure-as-a-jpeg#answer_151273

在 MATLAB Online 中打开

 filename = ['Point cloud ' num2str(5) '.jpg'];
 saveas(1,filename)

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Luke 2014-9-10

Cheers for the reply, what is the 'num2str(5)'?

Joseph Cheng 2014-9-10

编辑：Joseph Cheng 2014-9-10

Iain gave an example of building/concatenating the filename string first then using it in the saveas. Since your parameters are probably numbers Iain is converting the number of a said parameter to a string such that there would be no type mismatch.

So if you look at the function help (ie type in help num2str) you'll see what it does.

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