Reading a .mat file in c/c++

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Farik John 2015-12-17

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https://ww2.mathworks.cn/matlabcentral/answers/260743-reading-a-mat-file-in-c-c

评论： Tharun M 2016-5-18

I am reading a big .mat file in c/c++. That mat file has nested struct and depth. How can i read this file? Thanks in advance.

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James Tursa 2015-12-17

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https://ww2.mathworks.cn/matlabcentral/answers/260743-reading-a-mat-file-in-c-c#answer_203570

Use the mat API functions from the library (e.g., matOpen, matGetVariable, etc):

http://www.mathworks.com/help/matlab/read-and-write-matlab-mat-files-in-c-c-and-fortran.html

If you need to convert to/from a MATLAB struct and a C/C++ struct then you will need to copy each and every field element one-by-one (e.g., using mxGetField etc.)

What do you specifically mean by "4 depth" mat-file? A mat file simply has variables in it. The variables could be anything. I.e., structs that contain structs that contain structs etc. Is that what you mean by "4 depth", that some of the variables are structs 4 levels deep? If so, then you need to extract that info level-by-level manually in your C/C++ code to work with it (e.g., using mxGetField, followed by another mxGetField, followed by another mxGetField, etc).