how do I open files automatically in certain order?(numbers giving me trouble)
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
So, say I have these files named 1.0.txt, 1.5.txt, 2.0.txt, 2.5.txt, ... 10.0.txt, 10.5.txt
I am automatically opening the files by loop and do what I have to do with the file.
However, Matlab seems to see the file order starting from the first letter.
There fore, Matlab executes the loop in the order of 1.0.txt, 1.5.txt, 10.0.txt, 10.5.txt, 2.0.txt, 2.5.txt... and so on.
I can I avoid this and make the loop go in the order of 1.0, 1.5, 2.0, 2.5, ... 10.0, 10.5 ?
I am doing fprintf and the order is important for my calculation..
0 Commenti
Risposta accettata
Stephen23
il 27 Gen 2016
Modificato: Stephen23
il 26 Apr 2021
S = dir(...);
S = natsortfiles(S,'\d+\.?\d*');
for k = 1:numel(S)
F = S(k).name % filename
val = sscanf(F,'%f') % numeric value
...
end
And here are your example strings:
>> X = {'1.0.txt','1.5.txt','10.0.txt','10.5.txt','2.0.txt','2.5.txt'}
X =
'1.0.txt' '1.5.txt' '10.0.txt' '10.5.txt' '2.0.txt' '2.5.txt'
>> natsortfiles(X,'\d+(\.\d+)?')
ans =
'1.0.txt' '1.5.txt' '2.0.txt' '2.5.txt' '10.0.txt' '10.5.txt'
Do you see that my code puts them into the order that you want? That is why in my last answer I told you to use natsortfiles.
EDIT If the files always contain only one decimal values, and these are always the leading characters of the filename, then this will also work:
>> X = {'1.0.txt','1.5.txt','10.0.txt','10.5.txt','2.0.txt','2.5.txt'};
>> N = cellfun(@(s)sscanf(s,'%f'),X);
>> [~,idx] = sort(N);
>> X(idx)
ans =
'1.0.txt' '1.5.txt' '2.0.txt' '2.5.txt' '10.0.txt' '10.5.txt'
4 Commenti
Alikouider
il 24 Gen 2022
And if I would like to make an action between each file how can I handle it?
Image Analyst
il 24 Gen 2022
@Alikouider have a nested for loop. Inside get the names of the two files, then do whatever "action" you want to do. See the FAQ:
Più risposte (1)
Image Analyst
il 27 Gen 2016
You're going to have to get the base filename, and parse it to find the number. Try using sscanf() or str2double().
0 Commenti
Vedere anche
Categorie
Scopri di più su File Operations in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!