[gradsusr] Re : Viewing Climate Indices Created with CDO

Thu Apr 28 07:32:31 EDT 2011

Hi - Thanks for your help. I tried this - see below in bold. It didn't work.
Then I q'd the file within grads and tried to use the variable name it
listed...got a single value returned.....

Below is the output I get in grads and attached is the output I get when I
do an NCdump - I can't even tell if there are any index values in there or
not - I am starting to think not! Maybe the issue is with the CDO operator
(?)

Sarah.

ga-> sdfopen out.nc
Scanning self-describing file:  out.nc
SDF file out.nc is open as file 1
LON set to 0 360
LAT set to -88.572 88.572
LEV set to 0 0
Time values set: 2100:12:31:12 2100:12:31:12
E set to 1 1
ga-> d index
Syntax Error:  Invalid Operand
  'index' not a variable or function name
  Error ocurred at column 1
DISPLAY error:  Invalid expression
Expression = index

*ga-> q attr
*No Descriptor Attributes for File 1 :
Native Attributes for File 1 :
global String CDI Climate Data Interface version 1.4.7 (
http://code.zmaw.de/projects/cdi)
global String Conventions CF-1.0
global String history Thu Apr 28 12:20:40 2011: cdo -r -setname,index
echam5.dryindex.2081-2100try3.nc out.nc
global String history Thu Apr 28 12:19:47 2011: cdo -r eca_cdd
echam5.daily.pr_2081-2100.nc echam5.dryindex.2081-2100try3.nc
global String history Output from CERA Database/EH5_OM_20C_1_TEMP2  At
17:37:06 on 02/23/2005, CMOR rewrote data to comply with CF standards and
IPCC Fourth Assessment requirements
global String CDO Climate Data Operators version 1.4.7 (
http://code.zmaw.de/projects/cdo)
lon String long_name longitude
lon String units degrees_east
lon String standard_name longitude
lon String axis X
lon String bounds lon_bounds
lat String long_name latitude
lat String units degrees_north
lat String standard_name latitude
lat String axis Y
lat String bounds lat_bounds
time String units minutes since 1955-01-01 00:00:00
time String calendar proleptic_gregorian
number_of_cdd_p String long_name Number of cdd periods in given time period
with more than 5 days. The time period should be defined by the bounds of
the time coordinate.
number_of_cdd_p String units No.
number_of_cdd_p String grid_type gaussian
*ga-> d number_of_cdd_p
Constant field.  Value = 1

*
On Thu, Apr 28, 2011 at 10:54 AM, Bamba Sylla <syllabamba at yahoo.fr> wrote:

>  Hi,
>
> I guess it's because the variable name is too long. I suggest you do "q
> file" and whatever variable name it returns you display it.
>
> Hope this will help
> cheers
>
> ***************************************************
> Mouhamadou Bamba SYLLA, PhD
> Post-Doc Fellow, Earth System Physics
> International Centre for Theoretical Physics
> Strada Costiera 11, 34100 Trieste, Italy
> Office tel: 0039 040 2240 385
> Cell: 0039 34 71 94 06 55
> emails: msylla at ictp.it, syllabamba at yahoo.fr
> ***************************************************
>  ------------------------------
> *De :* sarah okeefe <sarahanneokeefe at gmail.com>
> *À :* gradsusr at gradsusr.org
> *Envoyé le :* Jeudi 28 Avril 2011 11h18
> *Objet :* Re : [gradsusr] Viewing Climate Indices Created with CDO
>
>  Hi, I am a beginning user of GRADS and would really appreciate some help.
>
>
> I took a model run and performed an operation using CDO that gave me the
> number of consecutive dry days for each grid box for the time period
> selected. I then open this in GRADS. When I try to view the results on a map
> GRADS keeps giving me an error that indicates index is not a variable name.
> I tried to open the file in XCONV to modify the variable name - but XCONV
> won't open the file. As a beginning user my skill set to solve these
> problems is quite limited. Does anyone know what I should do?
>
> *GRADS COMMAND:* d consecutive_dry_days_index_per_time_period
> *GRADS RESPONSE*
> Syntax Error:  Invalid Operand
>   'consecutive_dry_d' not a variable or function name
>   Error ocurred at column 1
> DISPLAY error:  Invalid expression
>   Expression = consecutive_dry_days_index_per_time_period
>
> *FILE INFO*
> ncdump echam5.dryindex.2081-2100.nc | more
> netcdf echam5.dryindex.2081-2100 {
> dimensions:
>         lon = 192 ;
>         nv = 2 ;
>         lat = 96 ;
>         time = UNLIMITED ; // (1 currently)
> variables:
>         double lon(lon) ;
>                 lon:long_name = "longitude" ;
>                 lon:units = "degrees_east" ;
>                 lon:standard_name = "longitude" ;
>                 lon:axis = "X" ;
>                 lon:bounds = "lon_bounds" ;
>         double lon_bounds(lon, nv) ;
>         double lat(lat) ;
>                 lat:long_name = "latitude" ;
>                 lat:units = "degrees_north" ;
>                 lat:standard_name = "latitude" ;
>                 lat:axis = "Y" ;
>                 lat:bounds = "lat_bounds" ;
>         double lat_bounds(lat, nv) ;
>         double time(time) ;
>                 time:units = "minutes since 1955-01-01 00:00:00" ;
>                 time:calendar = "proleptic_gregorian" ;
>         float consecutive_dry_days_index_per_time_period(time, lat, lon) ;
>
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>
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