mirror of
https://github.com/QuantumPackage/qp2.git
synced 2024-12-23 03:53:29 +01:00
29 lines
648 B
Fortran
29 lines
648 B
Fortran
program test_j_mu_of_r
|
|
implicit none
|
|
double precision :: x,mu_min,dmu,mu_max, mu, mu_p, mu_m
|
|
double precision :: j_simple,j_p, j_m,numeric_d_mu,d_dx_mu
|
|
double precision :: accu
|
|
integer :: npt,i
|
|
npt = 1000
|
|
mu_min = 0.3d0
|
|
mu_max = 10.d0
|
|
dmu = (mu_max - mu_min)/dble(npt)
|
|
x = 0.7d0
|
|
mu = mu_min
|
|
do i = 1, npt
|
|
call get_deriv_mu_j12(x,mu,d_dx_mu)
|
|
mu_p = mu + dmu
|
|
mu_m = mu - dmu
|
|
j_p = j_simple(x,mu_p)
|
|
j_m = j_simple(x,mu_m)
|
|
numeric_d_mu = 0.5d0 * (j_p - j_m)/dmu
|
|
print*,mu
|
|
print*,numeric_d_mu,d_dx_mu,dabs(d_dx_mu-numeric_d_mu)
|
|
accu += dabs(d_dx_mu-numeric_d_mu)
|
|
mu += dmu
|
|
enddo
|
|
accu *= dmu
|
|
print*,'accu = ',accu
|
|
end
|
|
|