| 1 | subroutine def_var(nid,name,title,units,nbdim,dimids,nvarid,ierr) |
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| 2 | |
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| 3 | ! This subroutine defines variable 'name' in a (pre-existing and opened) |
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| 4 | ! NetCDF file (known from its NetCDF ID 'nid'). |
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| 5 | ! The number of dimensions 'nbdim' of the variable, as well as the IDs of |
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| 6 | ! corresponding dimensions must be set (in array 'dimids'). |
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| 7 | ! Upon successfull definition of the variable, 'nvarid' contains the |
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| 8 | ! NetCDF ID of the variable. |
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| 9 | ! The variables' attributes 'title' (Note that 'long_name' would be more |
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| 10 | ! appropriate) and 'units' are also set. |
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| 11 | |
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| 12 | implicit none |
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| 13 | |
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| 14 | #include "netcdf.inc" |
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| 15 | |
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| 16 | integer,intent(in) :: nid ! NetCDF file ID |
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| 17 | character(len=*),intent(in) :: name ! the variable's name |
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| 18 | character(len=*),intent(in) :: title ! 'title' attribute of variable |
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| 19 | character(len=*),intent(in) :: units ! 'units' attribute of variable |
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| 20 | integer,intent(in) :: nbdim ! number of dimensions of the variable |
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| 21 | integer,dimension(nbdim),intent(in) :: dimids ! NetCDF IDs of the dimensions |
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| 22 | ! the variable is defined along |
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| 23 | integer,intent(out) :: nvarid ! NetCDF ID of the variable |
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| 24 | integer,intent(out) :: ierr ! returned NetCDF staus code |
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| 25 | |
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| 26 | ! 1. Switch to NetCDF define mode |
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| 27 | ierr=NF_REDEF(nid) |
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| 28 | |
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| 29 | ! 2. Define the variable |
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| 30 | #ifdef NC_DOUBLE |
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| 31 | ierr = NF_DEF_VAR (nid,adjustl(name),NF_DOUBLE,nbdim,dimids,nvarid) |
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| 32 | #else |
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| 33 | ierr = NF_DEF_VAR (nid,adjustl(name),NF_FLOAT,nbdim,dimids,nvarid) |
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| 34 | #endif |
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| 35 | if(ierr/=NF_NOERR) then |
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| 36 | write(*,*) "def_var: Failed defining variable "//trim(name) |
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| 37 | write(*,*) NF_STRERROR(ierr) |
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| 38 | stop "" |
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| 39 | endif |
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| 40 | |
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| 41 | ! 3. Write attributes |
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| 42 | ierr=NF_PUT_ATT_TEXT(nid,nvarid,"title",& |
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| 43 | len_trim(adjustl(title)),adjustl(title)) |
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| 44 | if(ierr/=NF_NOERR) then |
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| 45 | write(*,*) "def_var: Failed writing title attribute for "//trim(name) |
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| 46 | write(*,*) NF_STRERROR(ierr) |
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| 47 | stop "" |
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| 48 | endif |
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| 49 | |
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| 50 | ierr=NF_PUT_ATT_TEXT(nid,nvarid,"units",& |
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| 51 | len_trim(adjustl(units)),adjustl(units)) |
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| 52 | if(ierr/=NF_NOERR) then |
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| 53 | write(*,*) "def_var: Failed writing units attribute for "//trim(name) |
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| 54 | write(*,*) NF_STRERROR(ierr) |
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| 55 | stop "" |
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| 56 | endif |
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| 57 | |
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| 58 | ! 4. Switch out of NetCDF define mode |
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| 59 | ierr = NF_ENDDEF(nid) |
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| 60 | |
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| 61 | end |
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