How can I manipulate with fields in structure.
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I have struct s with 96 fields that have different names, each field is 44x1 column of numbers.
is it possible to divide all numbers in each field by some number, or use reshape to make from 44*1 to 11*4 matrix, or for example find max from each field and make a new array from those maximum values.
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Accepted Answer
Voss
on 4 Mar 2022
You can use structfun() for that:
% creating a struct like yours but with only 3 fields:
s = struct('field1',zeros(44,1),'field2',ones(44,1),'field3',randn(44,1))
% divide by 7:
s_new = structfun(@(x)x/7,s,'UniformOutput',false)
s_new.field2
% reshape:
s_new = structfun(@(x)reshape(x,11,4),s,'UniformOutput',false)
% get the max:
s_max = structfun(@max,s)
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Voss
on 4 Mar 2022
You're welcome!
If that answers your question, please consider marking the answer as 'Accepted'. Thanks!
More Answers (1)
Jan
on 4 Mar 2022
A loop over the field names can achieve this:
s = struct('field1',zeros(44,1),'field2',ones(44,1),'field3',randn(44,1)); % Thanks _
Field = fieldnames(s);
for k = 1:numel(Field)
s.(Field{k}) = s.(Field{k}) / 17;
% Or: s.(Field{k}) = reshape(s.(Field{k}), 4, 11);
end
This is done in structfun also, but the loop runs faster and is easier to read, in my opinion.
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