function call
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To tell my function to perform it's operations on files in a directory Function('directory') is the command for that. how do I tell this function to perform it's operations on only the first n files in that directory and not all of the files.
回答（2 个）
Grzegorz Knor
2011-11-14
Something like that:
function my_fun(directory,n)
a = dir(directory);
% a(1) is folder '.'
% a(2) is folder '..'
% so you have to start from a(3)
for k=3:n+2
disp(a(k).name)
% do more operation on folder/file
end
5 个评论
Titus Edelhofer
2011-11-14
Hi Grzegorz,
note though, that '.' and '..' need not always be the first two entries, I don't know how I managed but I had once stumbled across a folder where the first entry was some weirdly named folder (and therefore . and .. came second and thirs).
Titus
Grzegorz Knor
2011-11-14
Thank you for the advice! I thought that "." and ".." are always first.
Daniel Shub
2011-11-14
I don't know the specifics of dir/ls sorting, and cannot easily find it on the web, but a file with the name !, sorts before . and .. on Linux. Now why you would want such an awful file name ...
Fangjun Jiang
2011-11-14
Using a=a(~[a.isdir]) should solve the problem!
Walter Roberson
2011-11-14
dir() is *not* defined to return . and .. first in any of the operating systems. dir() is defined to return the order that the operating system returns. In turn, the order returned by the operating system can depend upon the file system type -- some filesystems sort directories contents automatically and some do not (and some use tree structures.)
Image Analyst
2011-11-14
0 个投票
Can't you specify a file extension to dir() and get only those specific files and not any directories?
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