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

Chapter 2 Basic Vector Operations 103
Maximum of vector SMAX/DMAX/IMAX
Name SMAX/DMAX/IMAX
Maximum of vector
Purpose Given a real or integer vector x of length n, these subprograms compute the
maximum of the elements of the vector
The vector can be stored in a one-dimensional array or in either a row or a
column of a two-dimensional array.
Usage VECLIB:
INTEGER*4 n, incx
REAL*4 s, SMAX, x(lenx)
s = SMAX(n, x, incx)
INTEGER*4 n, incx
REAL*8 s, DMAX, x(lenx)
s = DMAX(n, x, incx)
INTEGER*4 n, incx, s, IMAX, x(lenx)
s = IMAX(n, x, incx)
VECLIB8:
INTEGER*8 n, incx
REAL*4 s, SMAX, x(lenx)
s = SMAX(n, x, incx)
INTEGER*8 n, incx
REAL*8 s, DMAX, x(lenx)
s = DMAX(n, x, incx)
INTEGER*8 n, incx, s, IMAX, x(lenx)
s = IMAX(n, x, incx)
Input n Number of elements of vector x to be used. If n ≤ 0, the
subprograms do not reference x.
x Array of length lenx = (n−1)×|incx|+1 containing the
n-vector x.
incx Increment for the array x. x is stored forward in array x
with increment |incx|; that is, x
i
is stored in
x((i−1)×|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
s max x
i
: i 12… n,, ,=().=