Language Reference

DOT_PRODUCT(VECTOR_A, VECTOR_B)

Computes the dot product on two vectors.

VECTOR_A

is a vector with a numeric or logical data type.

VECTOR_B

must be of numeric type if VECTOR_A is of numeric type and of logical type if VECTOR_A is of logical type. It must be the same size as VECTOR_A.

Class

Transformational function

Result Value

The result is a scalar whose data type depends on the data type of the two vectors, according to the rules in Table 3 and Table 4.

If either vector is a zero-sized array, the result equals zero when it has a numeric data type, and false when it is of type logical.

If VECTOR_A is of type integer or real, the result value equals SUM(VECTOR_A * VECTOR_B).

If VECTOR_A is of type complex, the result equals SUM(CONJG(VECTOR_A) * VECTOR_A).

If VECTOR_A is of type logical, the result equals ANY(VECTOR_A .AND. VECTOR_B).

Examples

! A is (/ 3, 1, -5 /), and B is (/ 6, 2, 7 /).
      RES = DOT_PRODUCT (A, B)
! calculated as
!   ( (3*6) + (1*2) + (-5*7) )
! = (   18  +    2  +  (-35) )
! =  -15