[gradsusr] Get minimum and maximum value from a Time-Longitude plot

[Kathryn Sellwood - NOAA Affiliate]

"set lon lonval"  "d maxval(variable, t=1,t=2)

On Mon, Dec 26, 2016 at 1:14 AM, Lyndon Mark Olaguera <
olagueralyndonmark429 at gmail.com> wrote:

> Dear all,
>
> Is there an easy way to estimate the minimum value and maximum value from
> a time-longitude plot (minimum and maximum value per longitude and time).
> I am using grads 2.1.0.oga.1. I tried to use the amin() function but in
> the grads window, it gives an error: unknown command amin().
>
> Many thanks,
>
> *Lyndz*
>
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