MATLAB: Append non-compression data to matfile problem

Question

I want to append a variable to a existed .mat file, but Matlab occurs error:

Nocompression not supported for this MAT-file version. Use MAT-file v7.3 instead.

below is the test code:

    test=1;
    save test test
    T=rand(1e6,1);
    save('test.mat','T','-append','-nocompression')

is there any mistake with my operation?

Thanks!

Yu

Answer 1

Try this:

test=1;
save('test','test','-v7.3');
T=rand(1e6,1);
save('test.mat','T','-append','-nocompression')

-nocompression is only supported for MAT-files created in v7.3