how do I open files automatically in certain order?(numbers giving me trouble)
1 次查看(过去 30 天)
显示 更早的评论
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 个评论
采纳的回答
Stephen23
2016-1-27
编辑:Stephen23
2021-4-26
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 个评论
Image Analyst
2022-1-24
@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:
更多回答(1 个)
Image Analyst
2016-1-27
You're going to have to get the base filename, and parse it to find the number. Try using sscanf() or str2double().
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 File Operations 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!