Can't get contour plots to form/incompatible grids & trouble creating scripts

[Madhusoodanan M.S.]

Hi Mark,

vint(1000.,shum,350) will give you contour plot. check grads/netcdf
installation.

you've to rename hum.txt to hum.gs ; and use syntax as follows

ga>hum.gs or
ga>hum

grads look for the script name you types with .gs extension in the grads
root folder or in the current folder.

Madhu


On Fri, 19 Aug 2005, Martin Lollini wrote:

> Hi Mark, look if are you loading the nc file with gradsNC module and using
> version 1.9b or higher for grads?
> I don't have the manual here, i will check out at the office but 'vint' i
> think that is station function and doesn't work with 2D grid.
> The grads script files are txt format you can use extension .gs to
> difference but not necesary to run a script.
>
> good luck.
> climagro at gmail.com
>
>
>
> On 8/18/05, Mark Schuster <m_schus at yorku.ca> wrote:
>>
>> Hello all
>>
>> I am new to GRADS, and I am working with files that I downloaded from the
>> NCEP reanalysis page that are in .nc format. If I type something like...
>>
>> sdfopen shum9495.nc <http://shum9495.nc>
>> set lat 60
>> set lon 250
>> set t 1
>> d vint(1000.,shum,350)
>>
>> I will get the vertically integrated water content at that point which is
>> great, but I am more interested in the spatial distribution (contour
>> plot),
>> so I make the lat and lon vary. So if I type
>>
>> sdfopen shum9495.nc <http://shum9495.nc>
>> set lat 50 70
>> set lon 230 250
>> set t 1
>> d vint(1000.,shum,350)
>>
>> I get an error about incompatible grids, and I get the error box "this
>> program has performed an illegal operation and will be shut down". I have
>> no idea why I don't get a contour plot, as the data I downloaded is within
>> the grid that I specify. I am sure that it is probably a very simple thing
>> that I am totally unaware of that I am doing wrong since I am new to
>> grads.
>>
>> Also, for creating scripts, do I just type it up in notepad, and type run
>> script in the grads window? Extension is suppose to be .gs, but if you
>> type it in notepad, it has a .txt extension.
>>
>> Many thanks!
>>
>> Mark
>>
>

--

Madhusoodanan M.S.
Centre for Atmospheric and Oceanic Sciences
Indian Institute of Science
Bangalore, India - 560 012
Tel.    +91-80-23600450, +91-80-22932505 (Off) Extn.220
Mobile. +91-92421-67339
Fax.    +91-80-23600865