Re: Axis..

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Lorenzo,
You can define the new Y axis, and regrid the data to it.  If you define 
the new axis with the same number of grid points, with each value of Y 
in km corresponding to the value of hPa, then use the @ASN regridding 
transformation.  Say your existing Y axis, with the units of hPa is 
called yax. Do you have a functional relation between km and pressure 
units hPa?  If so, then you can use the pressure values from the Y axis 
to create the km axis.  If the pressure axis is called yax, then this 
would go something like this:

  yes? let yhpa = y[gy=yax]
  yes? let ykm =   function(yhpa)   ! whatever the correct functional 
relation is, say, 3*yhpa + 12
                                                    ! (I am must making 
that up)

  yes? define axis/y/units=km  yax_km = ykm

  yes? let newvar = oldvar[gy=ykax_km@asn]
  yes? plot newvar

Or, you can define the new axis from a list of km values:

  yes? let ykm = {1, 5, 15.2, 19, 30, 45}
  yes? define axis/y/units=km  yax_km = ykm

  yes? let newvar = oldvar[gy=ykax_km@asn]
  yes? plot newvar


Lorenzo Labrador wrote:

> Hi everybody:
> I'm  doing some simple plots from a dataset whose main y-axis units 
> are hPa. I would like to make the same plots  but using km instead for 
> the y axis.
> Any ideas?
>
> Thanks in advance,
>
> Lorenzo.
>
> ****************************************************************************** 
> Lorenzo Labrador
> Max Planck Institute for Chemistry      Tel: ++49/6131/305332
> Department of Airchemistry / NWG        FAX: ++49/6131/305577
> J.J. Becherweg 27                       email: lorenzo@mpch-mainz.mpg.de
> D-55128 Mainz
>
> ******************************************************************************