Getting matlab to automatically produce graphs and the save them

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Callum Swann 2020-4-28

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关闭： MATLAB Answer Bot 2021-8-20

I am new to Matlab so apologies if this seems simple.

I have a task where I have a number of folders containing .mat files and these files contain matrices.

I have folders 'test1' through to 'test50'. each folder contains 2 .mat files 'velocitydata.mat' and 'aerodynamicdata.mat'. Each .mat file has 3 matrices in the workspace Velocity,x,y,z and force,x,y,z.

I want to produce graphs for each folder showing plots of velocity in x over time and then save them in the relevant folder automatically. So for instance folder 'test1' will contain all the .mat files and the relevant .png graphs.

Is there anyway I can do this?

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Answer 1

Ameer Hamza 2020-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/521333-getting-matlab-to-automatically-produce-graphs-and-the-save-them#answer_428911

在 MATLAB Online 中打开

Try something like this

files = dir('*/velocitydata.mat');
for i=1:numel(files)
    filename = fullfile(files(i).folder, files(i).name);
    l = load(filename);
    plot(l.velocity_x);
    [~, name] = fileparts(filename);
    save_filename = fullfile(files(i).folder, [name, '.png']);
    print(save_filename, '-r300'); % 300 ppi resolution
end