error in xdef ctl file

[luis blacutt]

Thanks Kevin,

I changed the ctl file to:
dset /home/lucho/Desktop/GlueNC/bolbia.pmg1jul.03236.rr8.reg.nc
undef 9.999E+20
title baseline 60-90
*produced by LFA
dtype netcdf
options yrev
ydef 82 linear -33.640000 0.439000
xdef 97 linear -84.120000 0.440000
tdef 1 linear 00Z01jul1961 1mo
zdef 1 linear 1 1
vars 1
temperature_at_ 0 216,1,0  **
ENDVARS

now I got another error message

gancsetup error: Variable temperature_at_ not in netcdf file
Data Request Error:  Error for variable 'temperature_at_'
  Error ocurred at column 1
DISPLAY error:  Invalid expression
  Expression = temperature_at_

Luis

On Tue, Nov 17, 2009 at 6:27 PM, Kevin M Levey <klevey at customweather.com>wrote:

> Luis,
>
> the 5th argument is the data resolution, i.e. the incremental value, so if
> your x grid is 2 degrees, then your line should look like this
>
> xdef 97 linear -84.120000 2.00
>
>
>
> Your y increment is set to 2 degrees, so I am assuming your data resolution
> is 2x2 degrees.
>
> Here is the documentation:
>
> *XDEF* *xnum mapping <additional arguments>*
> back to top <http://grads.iges.org/grads/gadoc/descriptorfile.html#TOP>
>
> This entry defines the grid point values for the X dimension, or longitude.
> The first argument, *xnum*, specifies the number of grid points in the X
> direction. *xnum* must be an integer >= 1. *mapping* defines the method by
> which longitudes are assigned to X grid points. There are two options for
> *mapping*:
>
>    LINEAR    Linear mapping
>    LEVELS    Longitudes specified individually
>
> The LINEAR mapping method requires two additional arguments: *start* and *
> increment*. *start* is a floating point value that indicates the longitude
> at grid point X=1. Negative values indicate western longitudes. *increment
> * is the spacing between grid point values, given as a positive floating
> point value.
>
> The LEVELS mapping method requires one additional argument, *value-list*,
> which explicitly specifies the longitude value for each grid point. *
> value-list* should contain *xnum* floating point values. It may continue
> into the next record in the descriptor file, but note that records may not
> have more than 255 characters. There must be at least 2 levels in *
> value-list*; otherwise use the LINEAR method.
>
> Here are some examples:
>
>     XDEF 144 LINEAR 0.0 2.5  XDEF 72 LINEAR 0.0 5.0  XDEF 12 LEVELS 0 30
>    60 90 120 150 180 210 240 270 300 330  XDEF 12 LEVELS 15 45 75 105 135
>    165 195 225 255 285 315 345
>
>
>
> Regards,
>
> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape
> Town)
> Director of Meteorological Operations
> CustomWeather, Inc.
> San Francisco, California, USA
>
> "Taking the World by Storm!"
>
> http://www.customweather.com
> http://www.myforecast.com
> http://www.1stweather.com
>
> cell: 415-794-0411
> work: 415-777-3566
> email: klevey at customweather.com
>
> On Nov 17, 2009, at 11/17/09 - 2:07 PM, luis blacutt wrote:
>
> Dear Grads users
> I'm doing my first ctl file, it will have two variables, so far I have the
> following commands:
>
> dset /home/lucho/Desktop/GlueNC/bolbia.pag%x1%mc.%.nc
> options template
> undef 9.999E+20
> title baseline 60-90
> *produced by LFA
> dtype netcdf
> options yrev
> ydef 82 linear -33.640000 2.0000
> xdef 97 linear -84.120000 -41.880000
> tdef 1 linear 00Z01jul1961 1mo
> zdef 1 linear 1 1
> vars 2
> total_precipita 0 216,1,0  **
> temperature_at_ 0 216,1,0  **
> ENDVARS
>
> When I try to run it, it gives me the following error message
>
> Scanning description file:  baseline.ctl
> Open Error:  Missing or invalid dimension increment value
>   --> The invalid description file record is:
>   --> xdef 97 linear -84.120000 -41.880000
>   The data file was not opened.
>
> MyI checked by creating a grib file and those are the right numbers, the
> domain is for Southamerica. What am I missing?
> Regards
> Luis
>
>
>
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