[gradsusr] SET error: Missing or invalid arguments

[Andrew Friedman]

Hi Muhammad,

Are you able to open the file and plot the data?
What do you get when you type ‘q dims’?

-Andrew

> On Dec 26, 2017, at 11:47 PM, Dr. Muhammad Afzaal <afzaalkarori at gmail.com> wrote:
> 
> Dear Fellows
> 
> I am trying to calculate linear trend (Grads V2.0.1 on ubuntu 13);
> 
> 'sdfopen Era_RH_1981.nc'
> 'set t 1 last'
> 'ltrend r rh slope error' ;*r is the input variable
> 
> But got the error;
> 
> SET error:  Missing or invalid arguments for X option
> SET error:  Missing or invalid arguments for Y option
> SET error:  Missing or invalid arguments for T option
> Syntax Error:  Invalid dimension expression
>   Dimension value missing or invalid
> Error from SUM:  1st dimension expression invalid
> Operation Error:  Error from sum function
> Operation Error:  Error from tloop function
>   Error ocurred at column 1
> .............
> .............
> 
> Tried many options but could not resolve. Can anybody help me solve this problem
> 
> Following is file info;
> 
>    dimensions:
>       longitude = 55
>       latitude = 43
>       time = 360  // unlimited
>    variables:
>       float longitude ( longitude )
>          standard_name :        longitude
>          long_name :    longitude
>          units :        degrees_east
>          axis : X
> 
>       float latitude ( latitude )
>          standard_name :        latitude
>          long_name :    latitude
>          units :        degrees_north
>          axis : Y
> 
>       double time ( time )
>          standard_name :        time
>          units :        hours since 1900-01-01 00:00:00
>          calendar :     standard
> 
>       float r ( time, latitude, longitude )
>          standard_name :        relative_humidity
>          long_name :    Relative humidity
>          units :        %
>          _FillValue :   -32767
> 
> 
> Thanking in anticipation
> 
> Dr. MUHAMMAD AFZAAL 
> 
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