Why does dir('*.mat') not list all of the .mat files in directory?

Hello,

I'm trying to create a structure file which lists all of the .mat files in my directory:

files = dir('*.mat')

This code returns a 4x1 structure, but I have 8 .mat files in the directory. All 8 of the .mat files are the same format (i.e. 3 variables per .mat file). Can anyone tell me why my other .mat files are not being listed in the struct file?

Thanks, Dan

Answer 1

[Matt Fig]

Are you sure about those files being in there? Does WHAT see them (type: what) in there?

D = dir;
length(regexp([D(:).name],'\.mat'))  % What does this say

[Azzi Abdelmalek]

 length(regexp([D.name],'\.mat'))  % w:hy D(:)?

[Dan]

Matt,

The "what" command shows the names of all 8 files.

D = dir;
length(regexp([D(:).name],'\.mat'))  % What does this say

This code gives an answer of 8. I tried files = dir('*.mat') several times and still only get 4 files listed.

Thanks, Dan

[Matt Fig]

Azzi, No reason. Just my mental notation... ;-)

[Matt Fig]

I have no idea why this DIR isn't finding your files. Since WHAT is, why not just take:

W = what(pwd);
files = W.mat

[Dan]

Matt, your example above works just fine...now its just bugging me why DIR isn't working.

Thanks!

[Azzi Abdelmalek]

nice

Answer 2

[Azzi Abdelmalek]

try this

    d=dir
    d1=struct2cell(d);
    d2=d1(1,:);
    d3=cellfun(@(x) regexp(x,'.mat'),d2,'uni',false)
    d4=find(~cellfun('isempty', d3))
    files=d2(d4)'

[Dan]

Azzi, your work almost works for me, but 'files' then contains one .png that is in my directory.

[Jan]

~cellfun('isempty', d3) is faster than ~cellfun(@isempty, d3), which is faster than cellfun(@(x) ~isempty(x)).

[Azzi Abdelmalek]

thanks Simon, did'nt read your comment until now.