How to get a specific field from a structure stored in .mat file?

Question

Sidra Aleem 2017-5-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/339269-how-to-get-a-specific-field-from-a-structure-stored-in-mat-file

评论： Tobias Adam 2022-4-28

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I have saved my structure in . mat using.

filename = 'D:\我的文档\MATLAB\efe\Database.mat';
save(filename,'Data');

Structure got saved . However when I try to load a specific field then I cannot. I used the following line of code for loading.

S = load(filename,'Data.Images');

But when I click S in work space its empty and I got warning " Warning: Variable 'Data.Images' not found. " I also tried using -struct in save command but it throws error.

The argument to -STRUCT must be the name of a scalar structure variable.

Though It has been saved in .mat file. Below is attached screen shot of.mat file.Kindly guide me how to load Images field from stored structure in .mat file

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Adam 2017-5-8

编辑：Adam 2017-5-8

As far as I am aware you cannot load independent fields of a struct. If you save them as separate variables in the .mat file rather than a struct then you can do this, or you can load the whole struct, extract the field and get rid of the rest of the struct if it is too big.

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Answer 1

Walter Roberson 2017-5-10

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https://ww2.mathworks.cn/matlabcentral/answers/339269-how-to-get-a-specific-field-from-a-structure-stored-in-mat-file#answer_266386

It is not possible to load an individual field from a struct array in MATLAB.

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Tobias Adam 2022-4-28

Thank you very much for the answer :-)

Will it be possible in any moment?

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Answer 2

KL 2017-5-8

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https://ww2.mathworks.cn/matlabcentral/answers/339269-how-to-get-a-specific-field-from-a-structure-stored-in-mat-file#answer_266096

Here's a similar question. If this what you want?

https://de.mathworks.com/matlabcentral/answers/98870-is-it-possible-to-use-the-load-function-to-load-structure-fields-selectively-in-matlab

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Sidra Aleem 2017-5-9

@KL i have visited this link before posting my own question. And I have stated the errors that I am facing by using the solutions in the link you mentioned.

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