6 ! Run-time tests for transformations BESSEL_JN
9 real,parameter :: values(*) = [0.0, 0.5, 1.0, 0.9, 1.8,2.0,3.0,4.0,4.25,8.0,34.53, 475.78]
10 real,parameter :: myeps(size(values)) = epsilon(0.0) &
11 * [2, 7, 5, 6, 9, 12, 12, 7, 7, 8, 75, 6 ]
12 ! The following is sufficient for me - the values above are a bit
14 ! * [0, 5, 3, 4, 6, 7, 7, 5, 5, 6, 66, 4 ]
15 integer,parameter :: mymax(size(values)) = &
16 [100, 17, 23, 21, 27, 28, 32, 35, 36, 41, 49, 50 ]
17 integer, parameter :: Nmax = 100
18 real :: rec(0:Nmax), lib(0:Nmax)
21 do i = 1, ubound(values,dim=1)
22 call compare(mymax(i), values(i), myeps(i))
27 subroutine compare(mymax, X, myeps)
29 integer :: i, nit, mymax
32 rec(0:mymax) = BESSEL_JN(0, mymax, X)
33 lib(0:mymax) = [ (BESSEL_JN(i, X), i=0,mymax) ]
35 !print *, 'YN for X = ', X, ' -- Epsilon = ',epsilon(x)
37 ! print '(i2,2e17.9,e12.2,f18.10,2l3)', i, rec(i), lib(i), &
38 ! rec(i)-lib(i), ((rec(i)-lib(i))/rec(i))/epsilon(x), &
39 ! rec(i) == lib(i) .or. abs((rec(i)-lib(i))/rec(i)) < myeps
40 if (.not. (rec(i) == lib(i) .or. abs((rec(i)-lib(i))/rec(i)) < myeps)) &