if i have two vectors that result in a matrix that is 40x5 but i want the dimensions flipped, how would i do that

i have a vectors z and y when i multiply them i get a 40*5 matrix. however want a 5*40 matrix. how do i get the 5*40 matrix

Answer 1

[Jan]

x = 1:40;
y = 1:5;
M = y.' * x

Answer 2

[Stephen23]

You can use transpose:

 M.'

where M is the matrix.

Answer 3

[John BG]

if

size(z) 
= 
5 5 

size(y) 
= 
5 40

then

size(z*y)
=

    5 40

and

size(y'*z') 

=
40 5

if you are using element wise product

.*

then if

size(z)
=
1 40

size(y)
=
 1 5

then

size(z.'*y) 

= 
40 5

size(y.'*z)

= 
5 40

if you find this answer useful would you please be so kind to mark my answer as Accepted Answer?

thanks in advance

John BG

<mailto:[e-mail] [e-mail]>

[Jan]

The first part does not concern vectors, the second part mentions the "elementwise product", which does not matter here and the examples z.'*y and y.'*z do not even contain elementwise products .* .

[John BG]

this question already had my answer marked as accepted answer. The question originator marked my answer as the best answer supplied.

My answer comprises the common ways to multiply 2 vectors within the conditions mention in the question.

John BG

<mailto:[e-mail] [e-mail]>

[Jan]

No, John, your claim that it was the author of the question is wrong and flimsy. You have accepted this answer the first time and you did this again now. You know that your self-accepting is recorded in the "Recent Activity" list and you ignore that all users can read this.

Screenshot taken 25.02.2017 19:15 UTC:

Massive self-accepting is against the idea of this forum and in addition it is bad for your reputation (apart from the points): Who will trust your accepted answers when it is known, that you tend to accept them by your own? This forum is not a platform for chasing credits. Matlab is not Minecraft.