converting binary file fw to control file ctl

[Daniel Fritz]

Hey Eric,
   could you go alittle more into detail because i am
not quite understanding...do you mean my lat and lon
dimension environment.....how do i know what var is if
I am extracting data then writting the script for the
fwrite????
        DANNY
--- Eric Altshuler <ela at COLA.IGES.ORG> wrote:

> Danny,
>
> You need to know how the fwrite file was written,
> i.e. what was the dimension environment when the
> 'display VAR' command was given with gxout set to
> 'fwrite', which variables were displayed, etc. There
> is no way to create a ctl file for a binary dataset
> without knowing how the dataset was written, since
> it has no metadata. If you created the file in a
> grads session or script, you need to figure out what
> is actually in that file.
>
> Eric
>
> ----- Original Message -----
> From: "Daniel Fritz" <prodicalboxer at YAHOO.COM>
> To: GRADSUSR at LIST.CINECA.IT
> Sent: Thursday, February 7, 2008 10:41:31 PM
> (GMT-0500) America/New_York
> Subject: converting binary file fw to control file
> ctl
>
> Hello Everyone,
>     from using gxout fwrite in grads
>  there come a binary file example: filename.fx , how
> do you convert the fw binary file to a control
> file?????  I don't quite understand from reading the
> Grads manual......
>     can anyone help with this???
>       It's 10:30pm here, I will be up for
> awhile..please feel free to email...
>                   DANNY
>
> --- Adam Sobel <ahs129 at COLUMBIA.EDU> wrote:
>
> > Thanks Arlindo, took a bit of redoing to get the
> ctl
> > file to work with
> > "open" but it
> > seems to have fixed the problem now!
> >
> > Adam
> >
> > Arlindo da Silva wrote:
> > > On Feb 7, 2008 12:15 AM, Adam Sobel
> > <ahs129 at columbia.edu
> > > <mailto:ahs129 at columbia.edu>> wrote:
> > >
> > >     I have a set of netcdf files, each is 1 day.
> > I have a .ctl file
> > >     so I can
> > >     view a bunch of them together in sequence
> > using xdfopen.  The ctl file
> > >     is below.
> > >
> > >
> > >
> > >     If I set t to the whole time range (in this
> > case set t 1 12) I can
> > >     view
> > >     the variables u or v just fine, e.g. make
> > animations for the whole
> > >     period, looks good.  But then if I do
> > >
> > >     define rvort=hcurl(u,v)
> > >
> > >     I get a segmentation fault
> > >
> > >
> > > This is a well known problem in the v1.8/v1.9
> > series (but not v1.7b9
> > > and new v2). There is a memory leak in the
> > sdfopen/xdfopen part of the
> > > code that causes the amount of memory to
> increase
> > with the size of the
> > > timeseries until you ran out of memory. (On a
> > linux system you can
> > > watch this happen by opening another window and
> > executing "top"). I
> > > usually experience this problem with much longer
> > data sets, but all
> > > depends on your system load and horizontal
> > resolution.
> > >
> > > I have a patched a version of GrADS for use at
> > NASA/GMAO which is
> > > built with the sdfopen/xdfopen code from  v1.7b9
> > sdf/xdfopen code,
> > > with some of the bugfixes up to v1.9b4. Since it
> > *may* not address all
> > > NetCDF files supported by v1.9b4, COLA
> recommended
> > that this patch not
> > > be included in v1.9.0-rc1. Their recommended
> > action is to prepare a
> > > ctl file with "DTYPE netcdf"  and use the "open"
> > command. Another
> > > option is the just released v2, but this version
> > is still in active
> > > development and is not as stable as v1.9 yet.
> BTW,
> > this problem is
> > > common to netcdf and hdf files alike.
> > >
> > >      Arlindo
> > >
> > >
> > > --
> > > Arlindo da Silva
> > > dasilva at alum.mit.edu
> <mailto:dasilva at alum.mit.edu>
> >
> >
> > --
> >
>
----------------------------------------------------------------
> > Adam H. Sobel
> > Department of Applied Physics and Applied
> > Mathematics
> > Department of Earth and Environmental Sciences
> > Columbia University
> > 500 W. 120th Street, Room 217
> > New York, NY 10027 USA
> > tel: 212-854-6587
> > fax: 212-854-8257
> > e-mail: ahs129 at columbia.edu
> > web: http://www.columbia.edu/~ahs129/home.html
> >
> > UNTIL AUGUST 2008, ON SABBATICAL at
> > Bureau of Meteorology Research Centre
> > GPO Box 1289
> > Melbourne VIC 3001
> > Australia
> > tel: +61-(0)3-9669-4645
> >
>
----------------------------------------------------------------
> >
>
>
>
>
>
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