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REAL*4 function samaxf(n,dx,incx)
c
c finds the index of element having max. absolute 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*4 dx(*)
integer i,incx,ix,n
c
samaxf = 0.
if( n.lt.1 .or. incx.le.0 ) return
if(incx.eq.1)go to 20
c
c code for increment not equal to 1
c
ix = 1
samaxf = abs(dx(1))
ix = ix + incx
do 10 i = 2,n
if(abs(dx(ix)).le.samaxf) go to 5
samaxf = abs(dx(ix))
5 ix = ix + incx
10 continue
return
c
c code for increment equal to 1
c
20 samaxf = abs(dx(1))
do 30 i = 2,n
if(abs(dx(i)).le.samaxf) go to 30
samaxf = abs(dx(i))
30 continue
return
end
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