ismin, idmin 

Index of the real vector element with minimum value

FORMAT

  I{S,D}MIN (n, x, incx)

Function Value

  imin                integer*4

                      The index of the first element of the real vector x
                      such that (X(1+(imin-1)*|incx|)) is the smallest of all
                      elements in the vector.  If n<=0, imin returns the
                      value 0.

Arguments

  n                   integer*4
                      On entry, the number of elements in the vector x.
                      On exit, n is unchanged.

  x                   real*4 |  real*8
                      On entry, a one-dimensional array X of length at least
                      (1+(n-1)*|incx|), containing the elements of the real
                      vector x.
                      On exit, x is unchanged.

  incx                integer*4
                      On entry, the increment for the array X.
                      If incx > 0, vector x is stored forward in the array,
                      so that x(i) is stored in location X(1+(i-1)*incx).
                      If incx < 0, vector x is stored backward in the array,
                      so that x(i) is stored in location X(1+(n-i)*|incx|).
                      If incx = 0, only the first element is accessed.
                      On exit, incx is unchanged.

Description

  ISMIN and IDMIN determine the first integer i such that: x(i) = MIN{x(j), j
  = 1,2, ...,n}
  If incx = 0, the computation is a time-consuming way of setting imin = 1.

Example

  INTEGER*4 N, INCX, IMIN
  REAL*4 X(40)
  INCX = 2
  N = 20
  IMIN = ISMIN(N,X,INCX)

  This FORTRAN example shows how to compute the index of the vector element
  with minimum value.