What does this line does? "H(ind(:,k), ind(:,k))=S"

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Mina
Mina 2014-6-26
回答： Ajay Pherwani 2014-6-26
I am pretty new to matlab and i am trying to understand a certain code required for a university project. i am having a bit of problem understanding what this line does:
H(ind(:,k), ind(:,k))=S

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Ajay Pherwani
Ajay Pherwani 2014-6-26
assuming k = 4 and ind is an matrix of 4x6(4 rows x 6 columns ) -->ind(:,k) will give u all elements of column 4(value of k) in a single row matrix
assuming you are making a matrix H H(ind(:,k), ind(:,k)) --> that value in 4th column of ind matrix will decide which element will be update in H with the value in S
assuming 1st ind(:,k) = [1 2] 2nd ind(:,k) = [3 4]
then assignments will be like
H(1,3)=S H(1,4)=S H(2,3)=S H(2,4)=S

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