Workaround for fake file in memory?

Question

Ray Lee 2015-9-7

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https://ww2.mathworks.cn/matlabcentral/answers/240685-workaround-for-fake-file-in-memory

回答： Walter Roberson 2015-9-7

采纳的回答： Walter Roberson

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I have a mex function which reads data from a file and process it

result = mex_process_data(string_path_to_file);

The data is downloaded from website directly using

data = urlread2(url);

Now I save the data to a file and pass the filepath to the mex function. The IO is time-wasting. Is there a way to pass the data directly to the mex function without saving it to a temporary file (using Java class?)?

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Answer 1

Walter Roberson 2015-9-7

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urlread2 is from the File Exchange . It outputs a string, not a file. If you are writing to a file then that is in your own code.

If the mex requires a filename instead of a string, then change the mex. Or write to an solid state drive, or to a ramdisk.

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Answer 2

Image Analyst 2015-9-7

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I don't think so. If the mex file was written to accept a text string that represents a filename, then you're stuck with that. If you want it to accept a numerical array then you'd have to rewrite the mex code to do that.