MATLAB: Output matrices indexed by parameters

MATLABmatrix

I run a program where the parameters are (say) a, b, and c. I would like to have an output matrix (say) A indexed by the value of a, b, and c. For example, if the value of parameters are a=1, b=2, and c=3, I would like to have an output A_123. Please advise.

Best Answer

http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

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MATLAB: Matrices

Please try the following:

   X = [ 5 171 ; 5 300 ; 5 530 ; 5 700 ];
   M = 173;
   N = 712;
   Y = zeros(M,N);
   idx = M*(X(:,2)-1) + X(:,1) ;
   Y(idx) = 1;
   sum(Y(:))

HTH.

Rick

MATLAB: Changing matrices form, echelon the matrices

A=[0  1  0  0
  0  0  1  1
  0  0  0  1
  0  0  0  0]

%For the first case

n=size(A,1)
out=[A(1,:)';cell2mat(arrayfun(@(x) A(x,x+1:n)',(2:n-1)','un',0))]

% Forthe second case

B=A';
B=B(:)

Best Answer

Related Solutions

MATLAB: Matrices

MATLAB: Changing matrices form, echelon the matrices

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