How do I subtract all the values of one vector, one by one form an other vector, without using a for loop?

I am trying to optimize a for loop, where i want to remove an inner for loop by looping an entire vector, instead of looping each value of the vector.

I want to subtract all of the values from one vektor V, from an other vector B, so that I get a B(:)-V(n) vector, for each n value of V:

eksampel:

V = [1,2,3]

B = [4;11]

(The dimensions of the output vectors does not matter)

Result = [4-1,11-1;4-2,11-2;4-3,11-3]

Answer 1

[Star Strider]

The bsxfun function is perfect for this:

V = [1,2,3];

B = [4;11];

Result = bsxfun(@minus, B, V)';

[Rasmus Stenholt-Jacobsen]

Thank you so much. I was trying out some meshgrid combinations to make it work :)

[Star Strider]

My pleasure.

The meshgrid approach is correct, and in some situations preferable, for instance if you have several calculations involving the vectors. With one calculation, bsxfun is usually more efficient. This meshgrid approach also works for your problem:

[Vm,Bm] = meshgrid(V,B);
Result = Bm-Vm;