program main !*****************************************************************************80 ! !! shepard_interp_2d_test() tests shepard_interp_2d(). ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 21 September 2012 ! ! Author: ! ! John Burkardt ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer p_test_num parameter ( p_test_num = 4 ) integer g integer j real ( kind = rk ) p real ( kind = rk ), dimension ( p_test_num ) :: p_test = (/ & 1.0D+00, 2.0D+00, 4.0D+00, 8.0D+00 /) integer prob integer prob_num call timestamp ( ) write ( *, '(a)' ) '' write ( *, '(a)' ) 'shepard_interp_2d_test():' write ( *, '(a)' ) ' FORTRAN90 version' write ( *, '(a)' ) ' Test SHEPARD_INTERP_2D().' write ( *, '(a)' ) ' The R8LIB library is needed.' write ( *, '(a)' ) ' This test also needs the TEST_INTERP_2D library.' call f00_num ( prob_num ) g = 1 do prob = 1, prob_num do j = 1, p_test_num p = p_test(j) call test01 ( prob, g, p ) end do end do ! ! Terminate. ! write ( *, '(a)' ) '' write ( *, '(a)' ) 'SHEPARD_INTERP_2D_TEST:' write ( *, '(a)' ) ' Normal end of execution.' write ( *, '(a)' ) '' call timestamp ( ) stop 0 end subroutine test01 ( prob, g, p ) !*****************************************************************************80 ! !! TEST01 tests SHEPARD_INTERP_2D. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 21 September 2012 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, integer PROB, the problem number. ! ! Input, integer G, the grid number. ! ! Input, real ( kind = rk ) P, the power used in the distance weighting. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) logical, parameter :: debug = .false. integer g real ( kind = rk ) int_error integer nd integer ni real ( kind = rk ) p integer prob real ( kind = rk ) r8vec_norm_affine real ( kind = rk ), allocatable :: xd(:) real ( kind = rk ), allocatable :: xi(:) real ( kind = rk ), allocatable :: yd(:) real ( kind = rk ), allocatable :: yi(:) real ( kind = rk ), allocatable :: zd(:) real ( kind = rk ), allocatable :: zi(:) write ( *, '(a)' ) '' write ( *, '(a)' ) 'TEST01:' write ( *, '(a,i6)' ) ' Interpolate data from TEST_INTERP_2D problem #', prob write ( *, '(a,i6)' ) ' using grid #', g write ( *, '(a,g14.6)' ) ' using Shepard interpolation with P = ', p call g00_size ( g, nd ) write ( *, '(a,i6)' ) ' Number of data points = ', nd allocate ( xd(1:nd) ) allocate ( yd(1:nd) ) call g00_xy ( g, nd, xd, yd ) allocate ( zd(1:nd) ) call f00_f0 ( prob, nd, xd, yd, zd ) if ( debug ) then call r8vec3_print ( nd, xd, yd, zd, ' X, Y, Z data:' ) end if ! ! #1: Does interpolant match function at interpolation points? ! ni = nd allocate ( xi(1:ni) ) allocate ( yi(1:ni) ) xi(1:ni) = xd(1:ni) yi(1:ni) = yd(1:ni) allocate ( zi(1:ni) ) call shepard_interp_2d ( nd, xd, yd, zd, p, ni, xi, yi, zi ) int_error = r8vec_norm_affine ( nd, zi, zd ) / real ( ni, kind = rk ) write ( *, '(a)' ) '' write ( *, '(a,g14.6)' ) & ' L2 interpolation error averaged per interpolant node = ', & int_error deallocate ( xd ) deallocate ( xi ) deallocate ( yd ) deallocate ( yi ) deallocate ( zd ) deallocate ( zi ) return end subroutine timestamp ( ) !*****************************************************************************80 ! !! timestamp() prints the current YMDHMS date as a time stamp. ! ! Example: ! ! 31 May 2001 9:45:54.872 AM ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 15 August 2021 ! ! Author: ! ! John Burkardt ! implicit none character ( len = 8 ) ampm integer d integer h integer m integer mm character ( len = 9 ), parameter, dimension(12) :: month = (/ & 'January ', 'February ', 'March ', 'April ', & 'May ', 'June ', 'July ', 'August ', & 'September', 'October ', 'November ', 'December ' /) integer n integer s integer values(8) integer y call date_and_time ( values = values ) y = values(1) m = values(2) d = values(3) h = values(5) n = values(6) s = values(7) mm = values(8) if ( h < 12 ) then ampm = 'AM' else if ( h == 12 ) then if ( n == 0 .and. s == 0 ) then ampm = 'Noon' else ampm = 'PM' end if else h = h - 12 if ( h < 12 ) then ampm = 'PM' else if ( h == 12 ) then if ( n == 0 .and. s == 0 ) then ampm = 'Midnight' else ampm = 'AM' end if end if end if write ( *, '(i2.2,1x,a,1x,i4,2x,i2,a1,i2.2,a1,i2.2,a1,i3.3,1x,a)' ) & d, trim ( month(m) ), y, h, ':', n, ':', s, '.', mm, trim ( ampm ) return end