[gradsusr] SET error: Missing or invalid arguments

[Jennifer M Adams]

You appear to be using a script called ‘ltrend’ that has some specific needs for arguments that are not being satisfied. There’s no way for us to know what r/rh/slope/error are when you invoke that script. Look inside the script for what those variables should be and how they are handled — the clues to your error messages will be in there. Put in some diagnostic ‘say’ statements to monitor the script’s progress and so you can see where the ‘set’ and ‘sum’ errors are happening and what the invalid arguments contain.
—Jennifer



> On Dec 27, 2017, at 2:47 AM, 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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--
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
George Mason University