MATLAB: Save problem: -STRUCT must be the name of a scalar structure variable

save struct problem

I generated a struct file and tried to save it, but Matlab occurs error: The argument to -STRUCT must be the name of a scalar structure variable.
Below are the test code:
    for i=1:1:100
      fprintf('%0dth data.\n',i)
      eval(['test.p',num2str(i),'=1:1:2e5;'])
    end
    save('test.mat','-v7.3','-struct','S');
is there any problem with my code?
Thanks!
Yu

Best Answer

It is unclear from your post what the data type of variable "S" is. But the error is telling you that "S" is NOT a structure. You can either:
1) Change "S" to a structure variable containing the data you want to save.
or
2) Remove the '-struct' argument from the save command.
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