Saving a table-type variable to MAT file column by column in For-loop

Question

Smithy 2022-8-11

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1777665-saving-a-table-type-variable-to-mat-file-column-by-column-in-for-loop

评论： Smithy 2022-8-12

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Hello everybody,

I have big size of a table-type variable.

I am trying to save a table-type variable to .mat file column by column as table type in in For-loop.

I tried below code but it is not table and VariableNames disappear.

Is there a way to save .mat file as table type?

var = [num2cell(rand(4,3)), {'Steve';'John';'Paul';'Evan'}];
A = splitvars(table(var));
A.Properties.VariableNames = ["Aa","Bb","Cc","Dd"];
for i = 1:width(A)
    colData = A.(i);    % this case colData is not table type and column name disappear. 
    save([pwd,'\AA_' num2str(i) '.mat'],'colData')
end

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Answer 1

Walter Roberson 2022-8-11

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1777665-saving-a-table-type-variable-to-mat-file-column-by-column-in-for-loop#answer_1024945

在 MATLAB Online 中打开

outdir = pwd();
var = [num2cell(rand(4,3)), {'Steve';'John';'Paul';'Evan'}];
A = splitvars(table(var));
A.Properties.VariableNames = ["Aa","Bb","Cc","Dd"];
for i = 1:width(A)
    clear S
    thisvar = A.Properties.VariableNames{i};
    S.(thisvar) = A(:,i);
    save( fullfile(outdir, "AA_" + i + ".mat"), '-struct', 'S')
end
!ls
AA_1.mat  AA_2.mat  AA_3.mat  AA_4.mat
whos -file AA_1.mat
  Name      Size            Bytes  Class    Attributes

  Aa         -               1427  table              