CVM Class Library  8.1
This C++ class library encapsulates concepts of vector and different matrices including square, band, symmetric and hermitian ones in Euclidean space of real and complex numbers.
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icamin.f
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1 c BLAS routine missing in ACML and some other implementations
2 
3  integer function icamin(n,cx,incx)
4 c
5 c finds the index of element having min. absolute value.
6 c
7  complex cx(*)
8  real smin
9  integer i,incx,ix,n
10  real cabs
11 c
12  icamin = 0
13  if( n.lt.1 .or. incx.le.0 ) return
14  icamin = 1
15  if(n.eq.1)return
16  if(incx.eq.1)go to 20
17 c
18 c code for increment not equal to 1
19 c
20  ix = 1
21  smin = cabs(cx(1))
22  ix = ix + incx
23  do 10 i = 2,n
24  if(cabs(cx(ix)).ge.smin) go to 5
25  icamin = i
26  smin = cabs(cx(ix))
27  5 ix = ix + incx
28  10 continue
29  return
30 c
31 c code for increment equal to 1
32 c
33  20 smin = cabs(cx(1))
34  do 30 i = 2,n
35  if(cabs(cx(i)).ge.smin) go to 30
36  icamin = i
37  smin = cabs(cx(i))
38  30 continue
39  return
40  end
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