Creating Matrix using two vectors and scalar
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Hi guys,
I need your help in solving the following problem: Given a row vector, a column vector and an index create a matrix in the following manner (look at example) without using cell arrays and the implementation should be fast:
Remark: "index" correspond to the row column!
Thanks in advance.
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回答 (2 件)
Andrei Bobrov
2015 年 12 月 17 日
function out = fun1(r,c,ii)
out = ones(numel(c),1)*r;
out(:,ii) = c;
end
use
r = [2 7 3 5];
c = [2;7;10];
ii = 2;
out = fun1(r,c,ii);
0 件のコメント
Kirby Fears
2015 年 12 月 17 日
jack,
Please read the repmat() documentation to understand its interface and functionality. With repmat, you can stack copies of your row vector into a matrix.
You should be able to determine how many copies of your row vector to stack based on the length() or size() of your column vector.
From there, you just have to insert the column vector into the appropriate column using array indexing .
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