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Re: Unidata Support: 19980803: 2 Questions to netCDF 3.4

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  • Subject: Re: Unidata Support: 19980803: 2 Questions to netCDF 3.4
  • Date: Mon, 03 Aug 1998 10:09:28 -0600
Juergen,

> To: address@hidden
> From: address@hidden
> Subject: 2 Questions to netCDF 3.4
> Organization: .
> Keywords: 199808030909.DAA13766

In the above message, you wrote:

> I have 2 Questions to netCDF 3.4.
> 
> 1.  I want to use the fortran netcdf2.4 subroutine NCVPT1 in the netCDF3.4
> library on a CRAY J90 platform. But if I declare the variable as NCDOUBLE,
> there is no data written in the netCDF output file. ( if I declare the 
> variable
> as NCFLOAT, there are no problems!)
> Here is my test program:
> 
> program nc_w
> 
>   use netcdf
>   implicit none
> 
>   integer:: ncid,rcode,varid,TimeDimID,vaid
> 
>   real(KIND(0D0)) :: d
> 
>   ncid = nccre('test.nc',ncclob,rcode)
> 
>   TimeDimID  = NCDDEF(NCID,'time',1,RCODE)
> 
>   VAID = NCVDEF(NCID,'time',NCDOUBLE,1,TimeDimID,RCODE)
>   d=-8.9E7
> 
>   call ncendf(ncid,rcode)
> 
> 
>   CALL NCVPT1(NCID,VAID,1,d,RCODE)
> 
>   !  rcode= nf_put_var1_double(ncid,vaid,1,d)
>      ! with this 3.4 routine, it works!!
> 
>   call ncclos(ncid,rcode)
> 
> end program nc_w
> 
> I get following ncdump output:
> 
> netcdf test {
> dimensions:
>         time = 1 ;
> variables:
>         double time(time) ;
> data:
> 
>  time = _ ;
> }

Interesting.  Apparently the C macro NF_DOUBLEPRECISION_IS_C_... in
the file fortran/nfconfig.inc didn't get properly set by the configure
script when the netCDF package was built.

In order to help me determine why, would you please do the following:

    1.  Go to the top-level source directory of the netCDF package.

    2.  Send me the output from executing the "configure" script.

    3.  Send me the output from the following command:
    
            grep NF_DOUBLEPRECISION_IS_C_ fortran/nfconfig.in

    4.  Send me the output from the following command:

            grep NF_DOUBLEPRECISION_IS_C_ config.status

    5.  Please tell me the C data type on your Cray J90 that corresponds
        to the Fortran DOUBLEPRECISION data type.

--------
Steve Emmerson   <http://www.unidata.ucar.edu>