"Error using save Must be a string scalar or character vector." - but it is a string!
748 views (last 30 days)
Show older comments
I'm getting the error when I run the following line:
save(['data/test',num2str(n),'.mat'],U,U_old,dt);
where n is my loop index. This is bizarre. For the record, when I stop at the breakpoint, typing this at the command line works:
save data/test1.mat U U_old dt
But I need to be able to change the filename within the loop, hence why I'm doing it the first way. When I type this at the command line:
['data/test',num2str(n),'.mat']
I get the expected 'data/test1.mat' result. The variable U is an 889x4 matrix, U_old is the same size, and dt is a single float. Even typing
save('data/test1.mat',U,U_old,dt);
at the command line when I stop gives me this error. What gives?
0 Comments
Accepted Answer
More Answers (1)
Walter Roberson
on 7 Apr 2019
save( sprintf('data/test%d.mat', n), 'U', 'U_old', 'dt');
The quotes around the U and so on are the important part for your problem; the sprintf is just a cleaner way of creating the file name.
2 Comments
Shuting Li
on 3 Feb 2021
And where can I add filepath? I want to save file in other filepath? Thank you very much
Walter Roberson
on 3 Feb 2021
filename = fullfile(filepath, sprintf('test%d.mat', n));
save(filename, 'U', 'U_old', 'dt');
See Also
Categories
Find more on Cell Arrays in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!