for each element i of an array , look for a value on a different matrix with value=i

Hi there! Here is the problem: I have an array a: [1*n] This array contains indices of a reshaped Amatrix I want to use a for cyle( or smt else) to : for each element "i" of that array "a", find using ind2sub, the coordinates correspondent to i and then create a matrix with the same dimentions as matrixA, where the values correspondent to the coordinates found

this what I have(example)

aa=rand(2,2,2);
aareshaped=reshape(aa,[2,4]);
ii=rand(3,1);
irv=zeros(1,size(ind_reshaped));
irv(1,:)=ind_reshaped;

for(ki=(ind_reshaped(1):ind_reshaped(end)))
     [R1, C1, S1]=ind2sub(dimention_aa,ind_reshaped) 
     roi_mat=zeros(dimention_aa);
     roi_mat(R1,C1,S1)=1;
end

[Sven]

You're almost there, you've got code and an introduction, just not a question for us to answer.