Substract Each Element in A Matrix MAT1 from all the elements of another Matrix MAT2

Hi MATLAB experts ,

I have a matrix MAT1:

a1 x1 y1

b2 x2 y2

c3 x3 y3

and MATRIX MAT2 :

k1 z1

k2 z2

k3 z3

I want to do : (abs(x1-k1)+abs(y1-z1)) * (abs(x1-k2)+abs(y1-z2)) * (abs(x1-k3)+abs(y1-z3)) * ....etc

this is for every row of MAT1

Thanks very much

Answer 1

[Peng Li]

What MATLAB version are you using?

Newer versions actually support operations between e.g. a vector and a 2-d matrix if they have one dimension of the same length.

For your question, an easier work around is

k = 1;
prod(sum(mat1(k, 2:end) + mat2, 2));

you can make above code in loop to run through all rows. Should be ways to avoid this loop too.

[Tareq Rahmani]

Thanks very much . But, I want it without using any loop.

I want some matrix operations that lead to the result.

Because , I think using matrices directly exceutes faster than looping in case of huge data