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schaefed avatar schaefed commented on July 19, 2024

Hello milancurcic,

the main purpose of this module is to hide bookkeeping of identifiers and error checking behind a simple API, without sacrificing control over file creation and modification.

Reducing verbosity was never a design goal, but I would argue, mo_netcdf has a lot to offer in this respect too.

Let's have a look at some code:

  1. A (slightly modified) minimal example from the official docs.
use netcdf
implicit none
                                                                                                                                                                       
integer :: status, ncid
integer :: LonDimId, LatDimId, TimeDimId
integer :: RhVarId

status = nf90_create("foo.nc", nf90_NoClobber, ncid)
if(status /= nf90_NoErr) stop 1                                                                                                                                            
                                                                                                                                                                             
! Define the dimensions
status = nf90_def_dim(ncid, "lat", 5, LatDimId)
if(status /= nf90_NoErr) stop 1
                                                                                                                                                                             
status = nf90_def_dim(ncid, "lon", 10, LonDimId)
if(status /= nf90_NoErr) stop 1
                                                                                                                                                                             
status = nf90_def_dim(ncid, "time", nf90_unlimited, TimeDimId)
if(status /= nf90_NoErr) stop 1
                                                                                                                                            
! Define the variable
status = nf90_def_var(ncid, "rh", nf90_double, &
                (/LonDimId, LatDimID, TimeDimID /), RhVarId)         
if(status /= nf90_NoErr) stop 1

status = nf90_close(ncid)
if(status /= nf90_NoErr) stop 1
  1. The very same functionality using mo_netcdf
use mo_netcdf
implicit none

type(NcDataset) :: nc                                                                                                                                                      
type(NcVariable) :: var   

nc = NcDataset("bar.nc", "w")              
                                                                                                                                
var = nc%setVariable("rh", "f64",       &                                                                                                                                  
              (/nc%setDimension("lat", 5),   &                                                                                                                                  
                nc%setDimension("lon", 10), &                                                                                                                                  
                nc%setDimension("time")/))         
                                                                                                                            
call nc%close()

Cheers, David

from mo_netcdf.

milancurcic avatar milancurcic commented on July 19, 2024

Thanks, this example shows the difference clearly. I suggest you emphasize these points (bookkeeping, exception handling etc.) near the top of your README.

Great work with the library!

from mo_netcdf.

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