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Merge .mat file to one .mat files

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Yi Xien Yap
Yi Xien Yap 2022-8-18
编辑： Stephen23 2022-8-19
Hello,
I have 4 .mat files. The content in the .mat contain different variable name (From 1 - 100 for example). What I need to do is to combine the four output in the 4 .mat files to one. The output path of the .mat files is stored in a cell structure. What is the best way to do this??
For example:
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Yi Xien Yap
Yi Xien Yap 2022-8-18
Each mat file contain different cell array. For example in this mat file contain data from 10-20, and another one maybe go from 21 - 30. I want to merge them to one mat to show for instance from 1 - 50
Yi Xien Yap
Yi Xien Yap 2022-8-19
I found a way from this post https://uk.mathworks.com/matlabcentral/answers/96973-how-can-i-concatenate-or-merge-two-structures
mergestructs = @(a,b,c,d) cell2struct([struct2cell(a);struct2cell(b);struct2cell(c);struct2cell(d)],[fieldnames(a);fieldnames(b);fieldnames(c);fieldnames(d)]);

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Stephen23
Stephen23 2022-8-19
编辑：Stephen23 2022-8-19
Robust and efficient approach which works for any number of .mat files (unlike the verbose solution you found). Note that any duplicate variable names will be overwritten. Where D is your cell array of the filenames:
F = 'merged.mat';
copyfile(D{1},F)
for k = 2:numel(D)
S = load(D{k});
save(F,'-struct','S','-append')
end
Remember to always LOAD into an output variable:
S = load(..)

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