What to do about zeros in filenames when importing data to cell using sprintf ...

3 views (last 30 days)
This seems like it would be a fairly common problem, yet I haven't found any documentation or on Answers relating to this. So if anyone has a handy link, that'd be great (maybe it's too specific).
I have ten datasets in *.MAT format named sequentially:
Position01.mat, Position02.mat ... through to ... Position10.mat
Importing Position01 to Position09 to a cell is no issue, but opening and importing "Position10.mat" is made tricky because the number in its filename is "formatted" differently; specifically, doesn't start with zero. So, I'm wondering if I can keep my filenames, which keep the files nicely organised and in order outside MATLAB and find a workaround for dealing with "Position10.mat".
I'm currently using these lines to import the files ...
NumFiles = 10;
AudioCell = cell(1, NumFiles);
for k = 1: NumFiles
Position = sprintf('Position0%d.mat', k);
AudioCell{k} = importdata(Position);
It imports Position01 - Position09 exactly how I want, but Position10 has me stumped. Is changing the *.MAT filenames to "Position1", "Position2" and so on, my only decent option? So ...
Position = sprintf('Position%d.mat', k);
Thanks in advance!

Accepted Answer

Ameer Hamza
Ameer Hamza on 18 Oct 2020
Edited: Ameer Hamza on 18 Oct 2020
No, this is not the only option. The correct way is to use format specifier of sprintf() to add zeros automatically
sprintf('Position%02d.mat', k);
This will try to replace %02d with 2 digits. If k = 1 to 9, then it will append a zero.
Ameer Hamza
Ameer Hamza on 18 Oct 2020
Ture, sometimes all one needs is a correct hint, and the rest is easy to figure out.

Sign in to comment.

More Answers (0)


Find more on Data Import from MATLAB 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!