MATLAB: How to save fields of a struct through for loop iteration.

savingstruct

I have a struct with several field names.

data=

struct with fields:

'a': [100×1 double]

'b': [400×1 double]

etc.

I can save all the filed values to the same file as follow.

save(filename, 'a', 'b', …)

but, since the field name are too many, I want to to save all of them by for loop. Is there any way I can do that? Thank you!

Best Answer

You don't need a loop, just use the -struct flag to save the fields of a scalar structure:

save(filename,'-struct','data')

When you load the file, make sure that you use an output argument:

data = load(filename);

Related Solutions

MATLAB: Saving variables after every iteration.

That line

tabela(i)=trainingFeatures(i)

makes no sense at all. It stores numImages value in tabela , but for image i, it stores the 1st point of the ith feature vector and nothing else. I suspect you wanted either:

tabela = zeros(20, 64, numImages);  %store feature vectors as 3d matrix.
for i = 1:numimages
   %...

   tabela(:, :, i) = trainingFeatures;
end

You then get the feature vector for a given image with

   tabela(:, :, imagenumber)

Or you can use

tabela = cell(1, numImages);
for i = 1:numimages
   %...
   tabela{i} = trainingFeatures;
end

You then get the feature vector for a given image with

tabela{imagenumber}

MATLAB: Can’t I save this structure as a .mat file

You did not save a structure. The '-struct' option splits the fields of my_structure into separate variables before saving. However, it is best practice anyway to call load() with an output argument,

myStruct = load(filename_output)

and when you do you obtain your variables again in structure form.

Best Answer

Related Solutions

MATLAB: Saving variables after every iteration.

MATLAB: Can’t I save this structure as a .mat file

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