load a big data

I have a big structure .mat file called a.mat and it has a structure named stat. stat has filed called day. i.e., stat.day. There are 6 days and I only want to load one day, that is, stat.day(1). Can someone please tell me how I can do this without loading the whole structure in the memory. Thanks

Answer 1

[KSSV]

If you have saved the mat file using the version 7.3 then it is possible to load parts of it. For any other version lower then this, I don't think it is possible to load part of a file.

More on:

http://in.mathworks.com/help/matlab/import_export/mat-file-versions.html

http://in.mathworks.com/help/matlab/import_export/save-parts-of-variables-to-mat-files.html

[MINA]

I did use version v.3 when I saved the file. But I still don't know how I can get a subfield of the structure. Meaning, I only want stat.day(1) and not other stat.day(2:end).

[KSSV]

What is the file size?

If you are making the file, try to save it in ver 7.3.

[MINA]

About 8 Gb. And I saved it in ver 7.3.