Re: Variable length arrays

• To: netcdfgroup@xxxxxxxxxxxxxxxx
• Subject: Re: Variable length arrays
• From: William Weibel <weibel@xxxxxxxxxxxxxxxxxxxxxx>
• Date: Tue, 7 May 1996 10:35:55 -0700 (PDT)

Hi Lombardi,

Occasionally, I use malloc in FORTRAN programs.
But when I don't, I make a big static allocation in the main program,
and then do the I/O in subroutines, with variable length arrays.

For example

        real mat(1000000)
        ...
        nx = 5
        ny = 6
        nz = 7
        call scribere(mat,nx,ny,nz)

The subroutine looks like this

        subroutine scribere(myarray,n1,n2,n3)
        real myarray(n1,n2,n3)
        ...
        call ncvpt( CDFID, varid, START, count, myarray, ICODE )

You can make input subroutines that use this same feature.
Please write to me if you have more questions.

Bill

> Hi,
> I'm a fortran netcdf new user, and I neeed some help.
> 
> Since i fortran (not using the non-standard malloc) you have to 
> define the arrays at compile time, I' m used to do it using 
> dimension bigger than the maximum expected.
> 
> For istance:
>               real mat(100,100,100)
>       
> for beeing ready to have space for any array up to this dimension
> 
> Let now assume my real data is a 5*6*7 array (that is I used only
> part of tha available space) filled in this way:
> 
>               do i=1,5
>                  do j=1,6
>                     do k=1,7
>                        mat(i,j,k)=......
>                     enddo
>                  enddo
>               enddo
>       
> How do i vrite this (5*6*7) variable in a netcdf file?
> I suppose using NCVPT or NCVPTG but I have not been able to do it.
> 
> In another program I
> need to read the (5*6*7) data in a bigger array ready to contain 
> any-sized data.
> Here again I suppose I need to use NCVGT or NCVGTG but I did'nt 
> find out the way.
> 
> Please don't tell me to read the manual becouse I've already done it
> but it is to difficult for me to find out the way to use
> the arrays STRIDE and IMAP described there.
> 
> 
> 
> Thank a lot from Italy
> 
> Emanuele Lombardi
> mail:         ENEA AMB-CLIM-NUM
>       I-00060 S.M. di Galeria (RM) ITALY
> email:        lele@xxxxxxxxxxxxxxxxxxxxxxxxx
> tel   +39 6 30483366
> fax   +39 6 30483591
>       
> 


-- 
   William Weibel                           weibel@xxxxxxxxxxxxxx
   UCLA Department of Atmospheric Sciences  Tel. (310)206-4441       \\\\/
   Los Angeles, CA  90095-1565              Fax  (310)206-5219        O-O
   U.S.A.                                                              |
                                                                       - 
   'Why,' said the Dodo, 'the best way to explain it is to do it.'
                                Alice's Adventures in Wonderland
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