MATLAB: Regarding “Saving the data”

netcdf filesave in matfile

Dear All,

I am getting data from NETCDF files as follows:

time=double(netcdf.getAtt(ncFileId,netcdf.getConstant('NC_GLOBAL'),'time'));
data1=...
dat2=..
..
etc

And then save it like this:

data=[time data1 data2..];
data=double(data);

And then it will save as follows:

save(matfile,'data')

But, the data that came out from this is not completed. I mean the size of each matfile that save in this way is around 80k. While it should be ~3000-5000k. So, I am missing some data.

Does anyone knows how to resolve my problem?

I would greatly appreciate your help, Ara

Best Answer

You cannot rely on file size to tell you whether data is missing. Current MATLAB .mat files may contain compressed data. You should use "whos -file" on the file to look to see what variables are in the file and their sizes.

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Yuvashree, try

 data = [];
 for fileNr = 1:8   
    [...]                  % removed code for better readability
    data1 = load(FileName);
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       data = [data; data1.dataStruct.data];
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This is actually not an error. The "Data Type" and "Number of Bytes" fields in compressed MAT-files are reverse in order from non-compressed MAT-files.

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