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11.6 Write The Simple XY Example in F90
A Fortran 90 program that writes the simple_xy.nc example dataset.

  

program simple_xy_wr
  use netcdf
  implicit none

  character (len = *), parameter :: FILE_NAME = "simple_xy.nc"
  integer, parameter :: NDIMS = 2
  integer, parameter :: NX = 6, NY = 12
  integer :: ncid, varid, dimids(NDIMS)
  integer :: x_dimid, y_dimid
  integer :: data_out(NY, NX)
  integer :: x, y

  do x = 1, NX
     do y = 1, NY
        data_out(y, x) = (x - 1) * NY + (y - 1)
     end do
  end do

  call check( nf90_create(FILE_NAME, NF90_CLOBBER, ncid) )
  call check( nf90_def_dim(ncid, "x", NX, x_dimid) )
  call check( nf90_def_dim(ncid, "y", NY, y_dimid) )

  ! The dimids array is used to pass the IDs of the dimensions of
  ! the variables. Note that in fortran arrays are stored in
  ! column-major format.
  dimids =  (/ y_dimid, x_dimid /)

  call check( nf90_def_var(ncid, "data", NF90_INT, dimids, varid) )

  call check( nf90_enddef(ncid) )
  call check( nf90_put_var(ncid, varid, data_out) )
  call check( nf90_close(ncid) )

contains
  subroutine check(status)
    integer, intent ( in) :: status
    
    if(status /= nf90_noerr) then 
      print *, trim(nf90_strerror(status))
      stop "Stopped"
    end if
  end subroutine check  
end program simple_xy_wr

 


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