Re: xMon Avg in netcdf

Sam,

You need to read your error messages carefully. This one is telling you exactly what the problem is.

On line 68 you have:

        xMON&time = x&$x!0$(0) ; assign is day of month

The error is telling you that no coordinate variable exists for the "0"th dimension (leftmost dimension) of the variable "x".
In this case, you are trying to access a coordinate variable called "lv_ISBL0", which doesn't exist.

It is possible for a variable to have a named dimension, but to not have a coordinate variable of the same name.

You didn't include the output from "printVarSummary(x)", but you probably need to look at this closely
to make sure you are reading in the variable correctly. It looks like you are expecting a "time" dimension,
but the leftmost dimension here is actually "lv_ISBL0".

Perhaps you need to read the files in with the "join" mode, instead of "cat" mode, which is the default mode.

In "cat" mode, "addfiles" will simply concatenate each new set of values from a new file, causing the leftmost dimension
to grow in size. In "join" mode, a new dimension will actually be added, representing the number of files you are
reading in as the leftmost dimension.

For example, say you have a variable "T" on the file that is dimensioned 10 x 64 x 128 (lev x lat x lon). Further,
say you have 5 files each with a "T" variable that is 10 x 64 x 128.

If you read in "T" using addfiles in default "cat" mode, you will have a variable of size 50 x 64 x 128.

If you read in "T" using addfiles in "join" mode, you will have a variable of size 5 x 10 x 64 x 128.

To get addfiles to use the join mode, you need to do this right after the call to addfiles:

  ListSetType(f, "join")

--Mary

On Nov 29, 2011, at 3:30 AM, Idowu, Oluseun S. (UMKC-Student) wrote:

> Dear Users,
>
> I fixed the systemfunc failure issue with this script and I still continue
> to get the error message below. Please help. Thank you!
>
> Sam
>
>
>
> Variable: xMon
> Type: float
> Total Size: 524288 bytes
> 131072 values
> Number of Dimensions: 2
> Dimensions and sizes: [g4_lat_1 | 256] x [g4_lon_2 | 512]
> Coordinates:
> Number Of Attributes: 12
> initial_time : 01/01/1990 (00:00)
> forecast_time_units : hours
> forecast_time : 0
> parameter_number : 157
> parameter_table_version : 128
> gds_grid_type : 4
> level_indicator : 100
> _FillValue : 1e+20
> units : %
> long_name : Relative humidity
> center : European Center for Medium-Range Weather Forecasts (RSMC)
> average_op_ncl : dim_avg_n over dimension(s): lv_ISBL0
> fatal:No coordinate variable exists for dimension (lv_ISBL0) in variable
> (x)
> fatal:Execute: Error occurred at or near line 68 in file nc2monavgID_RH.ncl
>
> (0) Writing out netcdf
>
> Variable: xMON
> Type: float
> Total Size: 524288 bytes
> 131072 values
> Number of Dimensions: 3
> Dimensions and sizes: [time | 1] x [g4_lat_1 | 256] x [g4_lon_2 | 512]
> Coordinates:
> Number Of Attributes: 1
> _FillValue : 1e+20
>
>
>
>
>>
>
> <nc2monavgID_RH.ncl>_______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk

_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Tue Nov 29 07:50:55 2011