Assign column vector to a matrix row
显示 更早的评论
This always works, but why? Is it legal?
vert = [1:4]',
horiz = [11:14],
mat = zeros(4,4)
mat(2,:)=vert,
mat(3,:)=horiz
My vector is a column vector return by a function. I'm hoping to avoid an extra step just to transpose it.
2 个评论
Azzi Abdelmalek
2014-7-18
What is your problem?
Andrew Reibold
2014-7-18
This question made me laugh really hard, but I'm going to try to maintain professionality.
What are you trying to ask when you say "Is it legal?" I'm assuming you don't mean "Is it against the law?" !
采纳的回答
" For multidimensional arrays, a(I,J,K,...) = b assigns b to the specified elements of a. b must be length(I)-by-length(J)-by-length(K)-... or be shiftable to that size by adding or removing singleton dimensions. "
Here's another example where the mis-shaped right hand side of the assignment isn't even a vector,
>> mat=zeros(4); a=rand(1,1,2,3);
>> mat(1:2,1:3)=a
mat =
0.1779 0.8754 0.5206 0
0.5702 0.1890 0.4129 0
0 0 0 0
0 0 0 0
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