Find the index of nonempty array in a structure for a particular field

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naman
naman 2015-7-23
评论： Ali A. Ghafari 2020-1-10
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 个评论
Cedric
Cedric 2015-7-23
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?

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2015-7-23
编辑：Andrei Bobrov 2015-7-23
find(~cellfun(@isempty,{select.c}))

更多回答（1 个）

Jos (10584)
Jos (10584) 2015-7-23
编辑：Jos (10584) 2015-7-23
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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