how to write a matrix operation for subtract

Question

幸一 2024-1-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2072971-how-to-write-a-matrix-operation-for-subtract

评论：幸一 2024-1-23

I have sets of files (but no file extension), like follows (sample has been attached to the thread).

eachfile is 200x200 matrix

depth, depth_00001, depth_00002, depth_00003, depth_00004, depth_00005, depth_00006, depth_00007, depth_00008, depth_00009, depth_00010

I want to write a function to subtract 'depth' file from every other files of depth_00001 to depth_00010 and save the output as slide_00001, slide_00002, etc.

i want to do this at a single program at one time.

Please be kind enough to help anyone knows.

Previously I put the same question and I recived answers but not feasible.

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Answer 1

Walter Roberson 2024-1-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2072971-how-to-write-a-matrix-operation-for-subtract#answer_1394841

在 MATLAB Online 中打开

M = readmatrix('depth');
files = dir('depth_*');
for K = 1 : numel(files)
    infile = files(K).name;
    outfile = regexprep(infile, 'depth_', 'slide_');
    M_in = readmatrix(infile);
    difference = M_in - M;
    writematrix(difference, outfile);
end