integer function izamaxf(n,zx,incx) c c finds the index of element having max. absolute value. c jack dongarra, 1/15/85. c modified 3/93 to return if incx .le. 0. c modified 12/3/93, array(1) declarations changed to array(*) c double complex zx(*) double precision smax integer i,incx,ix,n double precision dcabs1 c izamaxf = 0 if( n.lt.1 .or. incx.le.0 )return izamaxf = 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 smax = dcabs1(zx(1)) ix = ix + incx do 10 i = 2,n if(dcabs1(zx(ix)).le.smax) go to 5 izamaxf = i smax = dcabs1(zx(ix)) 5 ix = ix + incx 10 continue return c c code for increment equal to 1 c 20 smax = dcabs1(zx(1)) do 30 i = 2,n if(dcabs1(zx(i)).le.smax) go to 30 izamaxf = i smax = dcabs1(zx(i)) 30 continue return end