Assign column vector to a matrix row
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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 Comments
Andrew Reibold
on 18 Jul 2014
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?" !
Accepted Answer
Matt J
on 19 Jul 2014
Edited: Matt J
on 19 Jul 2014
" 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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