CODEWITHSUNDEEP
matlab
Henry
Henry

Reputation: 171

How to load partial variables from mat files

In MATLAB, I have a structure saved into matlab file:

Ch=  
    H:[4-D double]
    D: [1x15 double]
    duration:6
    power: [1x1 struct]

the size of H is 

size(H) = 1332  15   4   128

save(examplefile, 'Ch','-v7.3')

Next I explain what I want to do:

Because, the file is huge, at some point of my code, I would like to load partial variables from the file examplefile. For example, at one point I would like to load only the first 1:1332/n of H of the file examplefile;, the second time I would only load the next varaiables running from 1333/n:2*1333/n an so on and so forth....

My question is how to load the partial variables from the file created?

Looking forward for suggestions and help

Upvotes: 0

Views: 654

Answers (1)

Daniel
Daniel

Reputation: 36720

You are looking for the matfile command. Unfortunately it is very limited in indexing, indexing structs is not supported. H must be a individual variable in the mat file.

%save using individual variables
save(examplefile,'-struct','Ch','-v7.3')
%create matfile object:
data=matfile(examplefile)
%example indexing operation. Only that part of `H` is read.
part=data.H(1:3,1,1,1)

Upvotes: 1

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