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

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Hi MATLAB experts ,
I have a matrix MAT1:
a1 x1 y1
b2 x2 y2
c3 x3 y3
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

Answers (1)

Peng Li
Peng Li on 28 Mar 2020
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.
  1 Comment
Tareq Rahmani
Tareq Rahmani on 28 Mar 2020
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

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