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Adding fields and values to a structure iteratively

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John Davis
John Davis on 17 Jul 2020
Commented: Stephen Cobeldick on 18 Jul 2020
I wish to make a struct with n fields, each containing a probability distribution generated by makedist(). As an example, let's take n=3. My code looks like this:
prior(1)=makedist('uniform',-1,1);
prior(2)=makedist('uniform',-1,1);
prior(3)=makedist('uniform',-1,1);
priors=struct('prior1',prior(1),'prior2',prior(2),'prior3',prior(3));
I would like to build the struct "priors" iteratively in a loop when n is large, but I'm having lots of difficulty working with structs, even after reading the documentation and other questions posted here. Any advice would be much appreciated!

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Stephen Cobeldick
Stephen Cobeldick on 18 Jul 2020
"I wish to make a struct with n fields,..."
Your code would be simpler and more efficient if you used a 1xn structure with one field:
S(1).prior = makedist('uniform',-1,1);
S(2).prior = makedist('uniform',-1,1);
S(3).prior = makedist('uniform',-1,1);

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Accepted Answer

Sindar
Sindar on 17 Jul 2020
n=3;
priors=struct();
for ind=1:n
priors.("prior"+ind) = makedist('uniform',-1,1);
end

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