[gradsusr] vertical cross section of horizontal divergence

Andrew Friedman andfried at gmail.com
Tue May 23 09:40:06 EDT 2017


HI Narasimha,

>From the hcurl documentation, http://cola.gmu.edu/grads/gadoc/gradfunchcurl.html, an x-y varying environment is required. In your case, latitude is fixed.
See example 2 for displaying a vertical cross section.

-Andrew

> On May 23, 2017, at 10:08 AM, Narasimha Rao <narasimhagen at gmail.com> wrote:
> 
> hello respected users,
> 
> I have wrf data and converted trough arwpost for grads compatible. My data in pressure levels. I am using grads 2.1v. Now i want to plot vertical cross section of horizontal divergence in grads. this is my error;
> 
> set lat 30
> set lon 74 81
> set lev 1000 100
> set t 9
> d hdivg(u,v) 
> 
> Error from HDIVG:  Invalid dimension environment
>   Horizontal environment (X, Y Varying) is required
> Operation Error:  Error from hdivg function
>   Error ocurred at column 1
> DISPLAY error:  Invalid expression 
>   Expression = hdivg(u,v)
> 
> -- 
> with Regards,
> N.Narasimha Rao
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