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Need to use cellfun for returning index of array
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Hello
I need to find index for string in structures when compare with required string.
I use the following code
for i=1:numel(LD)
if strcmp('Lam1',LD(i).Name)
break;
end
end
where i = array index.
Here I will find the index for string residing in LD(:).Names
is their any easy way to find the index using cellfun
I tried like this cellfun(@strcmp,'Lam1',LD(:).Names)
should return the index, correct me I am worng.
2 Comments
Jan
on 9 Jul 2012
Edited: Jan
on 9 Jul 2012
You forgot to explain the type of LD.Name: Are they strings or cell strings? And btw., is it LD.Name or LD.Names in plural? I avoid corresponding programming errors by the simple convention:
I do not think that this is nicer, but avoiding sources of bugs is more important, especially because useful programs tend to grow.
Accepted Answer
Jan
on 9 Jul 2012
Edited: Jan
on 9 Jul 2012
No need for cellfun or arrayfun:
index = find(strcmp('Lam1', {LD.Name}), 1);
{LD.Name} is efficient, because it creates shared data copies only - this means that the actual strings are not duplicated.
2 Comments
Jan
on 9 Jul 2012
find(., 1) searchs for the first occurrence only, see help find. On one hand this is a little bit faster, if LD is really large. On the other hand it replicates the behaviour of your function, which breaks after the first occurence also.
More Answers (2)
F.
on 9 Jul 2012
try this :
regexp( { LD(:).Name } , 'Lam1' , 'once )
it's to find the first occurance of Lam1 in the cell array { LD(:).Name }
0 Comments
Walter Roberson
on 9 Jul 2012
Edited: Walter Roberson
on 9 Jul 2012
cellfun(@(S) strcmp('Lam1',S), {LD.Name} )
0 Comments
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