How to use dir in a loop to be dynamic?
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi, Sorry for a simple question. I have abc1_0.765mat ......abc50_0.7462mat How I can call the dir in a loop.
for i=1:50
A = dir('abc1*.mat');% but it also calls abc11 and I just need abc1
end
I tried A=dir(fullfile... % but I got error
Any Suggestion
0 Kommentare
Akzeptierte Antwort
Cedric
am 20 Aug. 2015
We actually use DIR the other way around. If file names are very regular and determined by e.g. a number, we built them using SPRINTF:
for fId = 1 : 50
filename = sprintf( 'data_%02d.mat', fId ) ;
... do something ...
end
This generates names data_01.mat, data_02.mat, etc, over successive iterations. When we don't know file names, we get a directory listing using wildcards if we know a pattern, e.g.
listing = dir( 'abc*.mat' ) ;
Calling DIR once only, we get listing as a struct array whose entries contain references to all relevant files. Then we iterate over these entries:
for fId = 1 : numel( listing )
filename = listing(fId).name ;
... do something ...
end
Finally, we use FULLFILE when we need to concatenate elements of path, e.g. a folder name and a file name:
folder = 'MyData' ;
listing = dir( fullfile( folder, 'abc*.mat' )) ;
for fId = 1 : numel( listing )
fileLocator = fullfile( folder, listing(fId).name ) ;
... do something ...
end
4 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu File Operations finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!