delete a struct in a struct array

hi! I have the struct array a 1x3, I want to delete all the struct in the struct array in which the fields places and locs are zero. In this case a 1x1 as the fields places and locs equal to zero, so I want to delete it and transform a in a struct array from 1x3 to 1x2.

I have used this code

for k=1:3
if and(isempty(s(k).places),isempty(s(k).locs)) 
s(k)=[]; a=s;
end
end

but it gives the error

'Index exceeds matrix dimensions.'

How can I do, to solve?

Answer 1

[Stephen23]

>> idx = ~cellfun('isempty',{a.places});
>> b = a(idx)