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Technical Reference: Base Operating System and Extensions, Volume 2
CDOTU or ZDOTU Function
Purpose
Returns the complex dot product of two vectors.
Library
BLAS Library (libblas.a)
FORTRAN Syntax
COMPLEX FUNCTION CDOTU(N, X, INCX, Y, INCY)
INTEGER INCX, INCY, N
COMPLEX X(*), Y(*)
DOUBLE COMPLEX FUNCTION ZDOTU(N, X, INCX, Y, INCY)
INTEGER INCX, INCY, N
COMPLEX*16 X(*), Y(*)
Description
The CDOTU or ZDOTU function returns the complex dot product of two vectors.
Parameters
N |
On entry, N specifies the number of elements in X and Y; unchanged on exit. |
X |
Vector of dimension at least (1 + (N-1) * abs(INCX) ); unchanged on exit. |
INCX |
On entry, INCX specifies the increment for the elements of X; unchanged on exit. |
Y |
Vector of dimension at least (1 + (N-1) * abs(INCY) ); unchanged on exit. |
INCY |
On entry, INCY specifies the increment for the elements of Y; unchanged on exit. |
Error Codes
For values of N <= 0, a value of 0 is returned.
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