[gradsusr] Displaying a .nc file

[James T. Potemra]

If you enter "q file" at the GrADS prompt it should list the variables.

On 6/18/14 5:52 PM, David Stanfel wrote:
> How do I know what variable name will work? I've tried u, v, w, and z 
> and still only get:
>
> ga-> d v
>
> Error: Variable v not in netcdf file
>
> Data Request Error:  Error for variable 'v'
>
>   Error ocurred at column 1
>
> DISPLAY error:  Invalid expression
>
> Expression = v
>
>
> Thanks,
>
> David
>
>
> On Wed, Jun 18, 2014 at 11:13 PM, Hosmay Lopez <hlopez at rsmas.miami.edu 
> <mailto:hlopez at rsmas.miami.edu>> wrote:
>
>     David,
>
>     You should let GrADS know that the file is a netCDF. You do that
>     by adding the following text line in your control file:
>
>     DTYPE netcdf
>
>     Insert such after the UNDEF line.
>
>     Good luck!
>
>     Hosmay Lopez
>     UM/CIMAS/RSMAS NOAA/AOML/PHOD
>     4301 Rickenbacker Causeway,
>     Miami, FL 33149, USA
>     Phone: (305) 361-4329 <tel:%28305%29%20361-4329>
>
>     ------------------------------------------------------------------------
>     *From:* gradsusr-bounces at gradsusr.org
>     <mailto:gradsusr-bounces at gradsusr.org>
>     [gradsusr-bounces at gradsusr.org
>     <mailto:gradsusr-bounces at gradsusr.org>] on behalf of David Stanfel
>     [dstanfel at ualberta.ca <mailto:dstanfel at ualberta.ca>]
>     *Sent:* Wednesday, June 18, 2014 10:58 PM
>     *To:* GrADS Users Forum
>     *Subject:* [gradsusr] Displaying a .nc file
>
>     So I figured out how to use a descriptor file but I am still
>     having troubles opening the file. My descriptor file is as follows:
>
>     DSET   ^atmos_month.nc.0000
>     UNDEF  1.e-10
>     TITLE 6 Months Sample Model Output
>     *
>     XDEF 96 LINEAR  0.0   3.75
>     *
>     YDEF 80 GAUSR30 1
>     *
>     ZDEF 18 LEVELS  1000 950 900 850 800 750 700 650 600 550 500 450
>     400 350 300
>     250 200 150
>     *
>     TDEF 804  LINEAR JAN0 1MO
>     *
>     VARS 7
>     u 18   0  u
>     v 18   0  v
>     w 18   0  v
>     t 18   0  v
>     sh   18   0  v
>     rh   18   0  v
>     z 18   0  v
>     ENDVARS
>
>     It was able to open it without issue:
>
>     ga-> open cont.ctl
>
>     Scanning description file:  cont.ctl
>
>     Data file atmos_month.nc.0000 is open as file 1
>
>     LON set to 0 360
>
>     LAT set to -88.29 88.29
>
>     LEV set to 1000 1000
>
>     Time values set: 0:1:1:0 0:1:1:0
>
>     E set to 1 1
>
>
>     However, I am having trouble displaying the data. I tried to use
>     the display command (d) with this result:
>
>
>     ga-> d atmos_month.nc.0000
>
>     Syntax error: Bad file number for variable atmos_month
>
>     Error ocurred at column 1
>
>     DISPLAY error:  Invalid expression
>
>     Expression = atmos_month.nc.0000
>
>
>     Is my syntax off?
>
>
>     Thanks,
>
>
>     David
>
>
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>
>
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