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integer function isminf(n,sx,incx)
c
c finds the index of element having min. value.
c jack dongarra, linpack, 3/11/78.
c modified 3/93 to return if incx .le. 0.
c modified 12/3/93, array(1) declarations changed to array(*)
c
real sx(*),smin
integer i,incx,ix,n
c
isminf = 0
if( n.lt.1 .or. incx.le.0 ) return
isminf = 1
if(n.eq.1)return
if(incx.eq.1)go to 20
c
c code for increment not equal to 1
c
ix = 1
smin = sx(1)
ix = ix + incx
do 10 i = 2,n
if(sx(ix).ge.smin) go to 5
isminf = i
smin = sx(ix)
5 ix = ix + incx
10 continue
return
c
c code for increment equal to 1
c
20 smin = sx(1)
do 30 i = 2,n
if(sx(i).ge.smin) go to 30
isminf = i
smin = sx(i)
30 continue
return
end
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