loop with two variables
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Ilias Minas
on 9 Jul 2019
Commented: Walter Roberson
on 25 Jul 2019
Hello,
I am trying to write a code to do a loop with two variables.
I am solving the characteristic equation of a polynomial using the command root and i am taking the eigenvalues.
I want to change two variables (a and b) and do a loop. For every value of b calculate the eigenvalues at the range of a.
For example for a=0:1:3
b=0:1:3
And finally give me the results in a seperate matrix or vector.
Currently i am using arrayfun but only for one variable(a)
How can i do it?
Thank you
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Accepted Answer
Walter Roberson
on 9 Jul 2019
Edited: Walter Roberson
on 9 Jul 2019
avals=0:3;
bvals=0:3;
Numa=length(avals) ;
Numb=length(bvals) ;
Result=cell(Numa, Numb) ;
for aidx = 1:Numa
a = avals(aidx) ;
for bidx = 1:Numb
b = bvals(bidx) ;
Array=something involving a and b
Result{aidx, bidx} = eig(Array) ;
end
end
3 Comments
Walter Roberson
on 25 Jul 2019
av=0:1:3;
bv=0:1:3;
cv=0:1:3;
[A, B, C] = ndgrid(av, bv, cv);
result = arrayfun(@(a,b,c) FunctionOfThreeVariables(a,b,c), A, B, C)
If the function returns a non-scalar, then add 'uniform', 0 as an option to get a cell array of results.
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