How do I add elements to a structure in a loop?

I'm trying to fit a number of polynomials to x/y, and want to save the results of each fit so I can evaluate which is best. So...

for norder = 2:2:highestOrder [p,S,mu] = polyfit(x,y,norder); end

I'd like a structure 'poly' to be able to store 'p', 'S', and 'mu' for each iteration of the for loop. Ideally the structure would look like poly.p2, to poly.phighestOrder, poly.S2...

How would I do that?

Answer 1

[Stephen23]

Do not use a cell array of scalar structures, just use one non-scalar structure:

S = struct([]);
for k = 1:15
    [S(k).a,S(k).b,S(k).c] = polyfit(randi(20,1,100),randi(10,1,100),2);
end

Giving all iterations in one structure.

Answer 2

[ANKUR KUMAR]

Just simple store separated with dot. Example

for ii=1:15
    [a,b,c]=polyfit(randi(20,1,100),randi(10,1,100),2)
    poly{ii}.a=a;
    poly{ii}.b=c;
    poly{ii}.c=c;
end

[Kim]

When I try that I get "Cell contents assignment to a non-cell array object." And for each iteration it just overwrites the previous.