Specify row and column independently to update matrix?

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Andrew Landau
Andrew Landau 2018-3-4
评论： Andrew Landau 2018-3-4
Lets say I have a matrix: X = zeros(3);
and want to add a vector: x = [1 2 3]; to the matrix, but add it such that each number is added to a different column in each row defined by y = [1 2 3].
I could write a for loop,
for i = 1:length(x)
X(i,y(i)) = x(i);
end
but it should be possible to do this in a single line....
any suggestions? thanks

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Jos (10584)
Jos (10584) 2018-3-4
doc sub2ind

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