MATLAB: Loop with two variables

loop

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

Best Answer

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
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