Writing out to a file and cdiff

[Jeffrey Duda]

Yeah.  I can't define a product that involves the cdiff command in the
z-dimension.  However, for some odd reason, I can display a product using
the cdiff command in the z-dimension.  What I mean is, I can't have the
following INSIDE a grads script:

'define dz = cdiff(hght,z)'

However, If I wanted to display something like vertical wind shear, I could
do so by typing in the command window:

'display cdiff(u,z)/cdiff(hght,z)'

and it would display just fine.  I'm not sure why this is.  I'm running
version 2.0.a5 though, so maybe it's a problem with the version.

Jeff

On Thu, Feb 11, 2010 at 1:44 PM, J-P Michael <jm08j at fsu.edu> wrote:

> Jeff,
> This may be a foregone conclusion for most but there is some issue with
> cdiff in z, depending on the version of GrADS you are using. Are you able to
> cdiff in x and y and failing in the z?
>
> J-P Michael
> Florida State University
>
> ----- Original Message -----
> From: Jeffrey Duda <jdduda at IASTATE.EDU>
> Date: Tuesday, February 9, 2010 4:55 pm
> Subject: Writing out to a file and cdiff
> To: GRADSUSR at LIST.CINECA.IT
>
> > I have two questions.
> >
> > 1) How do you write data out to a file in text format?  I know
> > there is an
> > fwrite command, but I don't really know how it works.
> >
> > 2) Can the cdiff command work when three environment dimensions are
> > varying?  I'm trying to compute EPV, but to do so, I need to do a
> > cdiffcommand in the x, y, and z dimensions, but I always get an
> > error and usually
> > Grads crashes when I do it.
> >
> > Jeff Duda
> >
> > --
> > Jeff Duda
> > Iowa State University
> > Meteorology Graduate Student
> > 3134 Agronomy Hall
> > www.meteor.iastate.edu/~jdduda <http://www.meteor.iastate.edu/%7Ejdduda>
> >
>



-- 
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda
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