problem in inserting a diagnol
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hi, i have a problem in inserting the diagnol of a matrix. i have a=[1 2 3;4 5 6;7 8 9] in which i have to extract the diagnol by multiplying with 2 and i want to again insert the diagnol i,e iwant to have [2 2 3;4 10 6;7 8 18]; i dont want to use the loop.
3 个评论
the cyclist
2012-7-12
编辑：the cyclist
2012-7-12
Seems like a homework problem. What have you tried already? (Also, should that 27 actually be an 18?)
Yash
2012-7-12
how do u want the output to be
San
2012-7-12
he want to have double for diagonal but don't want loop :(
回答（1 个）
Conrad
2012-7-12
A = [ 1 2 3;...
4 5 6;...
7 8 9];
A(1:(length(A)+1):numel(A)) = 2*diag(A);
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