HP MLIB User's Guide Vol. 1 7th Ed.

Chapter 2 Basic Vector Operations 147
Weighted dot product SWDOT/DWDOT/CWDOTC/CWDOTU/ZWDOTC/ZWDOTU
Input n Number of elements of vectors w, x, and y to be used in
the dot product. If n ≤ 0, the subprograms do not
reference w, x, or y.
w Array of length lenw = (n−1)×|incw|+1 containing the
n-vector w.
incw Increment for the array w:
incw ≥ 0 w is stored forward in array w; that is,
w
i
is stored in w((i−1)×incw+1).
incw < 0 w is stored backward in array w; that
is, w
i
is stored in w((i−n)×incw+1).
Use incw = 1 if the vector w is stored contiguously in
array w; that is, if w
i
is stored in w(i). Refer to “BLAS
Indexing Conventions” in the introduction to this
chapter.
x Array of length lenx = (n−1)×|incx|+1 containing the
n-vector x. x is used in conjugated form by CWDOTC
and ZWDOTC and in unconjugated form by the other
subprograms.
incx Increment for the array x:
incx ≥ 0 x is stored forward in array x; that is,
x
i
is stored in x((i−1)×incx+1).
incx < 0 x is stored backward in array x; that
is, x
i
is stored in x((i−n)×incx+1).
Use incx = 1 if the vector x is stored contiguously in
array x; that is, if x
i
is stored in x(i). Refer to “BLAS
Indexing Conventions” in the introduction to this
chapter.
y Array of length leny = (n−1)×|incy|+1 containing the
n-vector y.