| Module radin_mod |
| INTEGER, PARAMETER :: DP = selected_real_kind(14,200) |
| Contains |
| Subroutine SPLIFT (X,Y,YP,YPP,N,IERR,ISX,A1,B1,AN,BN) |
| Integer, Intent(in) :: N,ISX |
| Real(dp), Intent(in) :: X(N),Y(N),A1,B1,AN,BN |
| Real(dp), Intent(out) :: YP(N),YPP(N) |
| Real(dp), Allocatable, Dimension(:,:) :: W |
| NM1 = N-1 |
| NM2 = N-2 |
| If (ISX.Gt.0) GO TO 40 |
| Do I=2,N |
| If (X(I)-X(I-1) .Le. 0) Then |
| IERR = 3 |
| Return |
| Endif |
| End Do |
| Allocate(W(N,3)) |
| 40 YPP(1) = 4*B1 |
| DOLD = (Y(2)-Y(1))/W(2,2) |
| Do I=2,NM2 |
| DNEW = (Y(I+1) - Y(I))/W(I+1,2) |
| YPP(I) = 6*(DNEW - DOLD) |
| YP(I) = DOLD |
| DOLD = DNEW |
| End Do |
| Return |
| End Subroutine SPLIFT |
| End Module radin_mod |
| |
