Is there a way to assign the 'end' value to a variable?
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Hello everyone,
this is my first question. Sorry if it's too simple or easy, but i couldn't find the answer at Google.
I was programming a simple script to locate all file names in a folder. Most of them had a similar name, with '_' character in it (ex: file_name.mat), but not all of them. I wanted only the firt part of the name, from those with '_' character.
I did something like this (is a shorter version of my code):
for i=1:length(list_of_files)
b=findstr('_',list_of_files(i).name)-1;
if isempty(b)
b='end' %That's my question
end
another_list{i}=list_of_files(i).name(1:b)
end
I know that i could just use 'length(list_of_files(i).name)' instead of 'end', but i was out of curiosity to ask about if it was possible to assign 'end' to a variable, and how?
I've already tried something like:
b=end;
b='end';
Doesn't work!
Thanks
Sergi
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Accepted Answer
Steve Eddins
on 10 Jul 2012
No, you can't assign the indexing value of "end" to a variable. You have to use size, or length, or numel in order to assign the value to a variable.
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More Answers (4)
F.
on 10 Jul 2012
And did you try strread ??
[A, B, ...] = strread('str', 'format')
[ NameStart, NameEnd ] = strread( list_of_files(i).name, '%s_%s')
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Jan
on 10 Jul 2012
Edited: Jan
on 10 Jul 2012
for i=1:length(list_of_files)
b = strfind(list_of_files(i).name, '_') - 1; % FINDSTR is deprecated
if isempty(b)
another_list{i} = list_of_files{i}; % Curly braces!
else.name(1:b)
another_list{i} = list_of_files{i}(1:b(1));
end
end
"b(1)" considers even multiple underscores. But if an underscore appears, the file extension is cut off also, while it is kept for names without underscores.
strtok can do the conversion also. You can even avoid the loop:
another_list = strtok(list_of_files, '_');
But the file extension problem is still not addressed.
Daniel Shub
on 10 Jul 2012
While I have not verified it, I think if you really wanted to assign
b='end'
and then use it for indexing, that you could overload subsref. I cannot think of a good reason you would want to do this.
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