Multiplying two vectors to form a matrix

Hello, I have two vectors x and y, both 601x1. I want to multiply them to form a matrix of 601x601, but the values inside the matrix have to be sqrt(x^2+y^2). How do I do this? Thanks.

Answer 1

[Jan]

z = sqrt(x .^ 2 + y.' .^ 2)

But, of course, this does not match "multiply them". If you want a multiplication:

x .* y.'

[EDITED] For Matlab versions < R2016b:

z = sqrt(bsxfun(@plus, x.'.^2, y.^2))

[Nikola Segedin]

Multiplication is not the right word, I agree. I've tried this and all I got is "Error using plus, Matrix dimensions must agree.".

[Jan]

See my comment under Walter's answer.

Answer 2

[KSSV]

x = rand(601,1) ;
y = rand(601,1) ;
iwant = sqrt(x.^2+y'.^2) ;
size(iwant)

ans = 1×2

601 601

Answer 3

[Walter Roberson]

D = sqrt(x.'.^2 + y.^2)

[Walter Roberson]

The difference between my answer and the nearly-simultaneous answers by @KSSV and @Jan is that I arranged for the x coordinates to run horizontally but they have the x coordinates run vertically.

[Nikola Segedin]

I've tried this and all I got is "Error using plus, Matrix dimensions must agree.".

[Jan]

@Nikola Segedin: Which Matlab versionare you using? Since R2016b an "implicit expanding" is applied. For former versions:

D = sqrt(bsxfun(@plus, x.'.^2, y.^2))

[Nikola Segedin]

I'm using R2010b. Thank you, this works for me!