Find the index of nonempty array in a structure for a particular field
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Hi I have a structure with one field e.g. select(i).c, where i=1,...,N. I want to find the index i for which select(i).c is nonempty. How can I do it ? Thanks
1 Comment
Cedric
on 23 Jul 2015
select is a struct array actually. Do you need the index of the non-empty content or would the content be enough? And what is the type/class of what is stored in field c?
Accepted Answer
Andrei Bobrov
on 23 Jul 2015
Edited: Andrei Bobrov
on 23 Jul 2015
find(~cellfun(@isempty,{select.c}))
More Answers (1)
Jos (10584)
on 23 Jul 2015
Edited: Jos (10584)
on 23 Jul 2015
use ARRAYFUN
% create some data
for j=1:10, select(j).c = repmat(j,round(rand(1))) ; end
% engine
tf = arrayfun(@(k) ~isempty(select(k).c), 1:numel(select))
idx = find(tf)
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