dot

Vector dot product

Syntax

• C = dot(A,B)
  C = dot(A,B,dim)
  

Description

C = dot(A,B) returns the scalar product of the vectors A and B. A and B must be vectors of the same length. When A and B are both column vectors, dot(A,B) is the same as A'*B.

For multidimensional arrays A and B, dot returns the scalar product along the first non-singleton dimension of A and B. A and B must have the same size.

C = dot(A,B,dim) returns the scalar product of A and B in the dimension dim.

Examples

The dot product of two vectors is calculated as shown:

• a = [1 2 3]; b = [4 5 6];
  c = dot(a,b)
  
  c =
        32