Vector in a Matrix 2x2, calculate the length of the vector

%Hello Matlab friends

%I would like to calculate the length aut of a 2x2 Matrix. A=[0 0;12 12]; two points x0/y0 and x12/y12.

A=[0 0;12 12]

l= sqrt((A(2,1)-A(1,1))^2+(A(2,2)-A(1,2))^2);

%i am happy for every help, thank you

[Torsten]

Your code is correct. Or what was your question ?

An alternative code:

A=[0 0;12 12];
l = norm(A(1,:)-A(2,:))

l = 16.9706

Answer 1

[Steven Lord]

If I understand your question correctly I think what you want is the vecnorm function.

[Manuel]

%Thanks for you immediate help!

%i have one more question, how can i shorten a Vector how is not in the origin. Again two Points and the first Point should remain on its place.

B=[9 0; 4.5 8 ]; two Points x9/y0 and x4.5/y8. I would like to shorten the vector. But the first Point should stay where it is. i tryied as followed:

v=[B (:,1);B(:,2)*1/3]

or

V=[B (1,1:2);B(2,1:2)*1/3];

or

s=B (:,1); first point

t= B(:,2)*1/3; %second point shortened by 1/3

u= [s; t];

%Thank you in advance!