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

[Lyndon Mark Olaguera]

Hi Kathryn,

It does not work for. I also tried the max(variable,t=1,t=2) but this gives
me a very small number.
I am attaching here the sample netcdf file and my script in plotting the
time longitude plot.

'sdfopen filt_olr_anom_1975.nc'
'set display color white'
'c'
'set lon 80 180'
'set gxout contour'
'set ccolor 1'
*'set cint 10'
'set t 43 53'
'set y 1'
'set yaxis 43 53'
'define tt=ave(bf,lat=12.5,lat=22.5)'
'd tt'

Link of the file:

https://drive.google.com/file/d/0B9faET7Bc2o8aXB1dVhUZUNDVHc/view?usp=sharing

I want to get the maximum value, say between lon 80 and lon 90, time  43 to
time 44.

Many thanks in advance for the help,

*Lyndz*


On Tue, Dec 27, 2016 at 10:51 AM, Lyndon Mark Olaguera <
olagueralyndonmark429 at gmail.com> wrote:

> Hi Kathryn,
>
> It does not work for. I also tried the max(variable,t=1,t=2) but this
> gives me a very small number.
>  I am attaching here the sample netcdf file and my script in plotting the
> time longitude plot.
>
> 'sdfopen filt_olr_anom_'year'.nc'
> 'set display color white'
> 'c'
> 'set lon 80 180'
> 'set gxout contour'
> 'set ccolor 1'
> *'set cint 10'
> 'set t 43 53'
> 'set y 1'
> 'set yaxis 43 53'
> 'define tt=ave(bf,lat=12.5,lat=22.5)'
> 'd tt'
>
> Many thanks for the help,
>
> *Lyndz*
>
> On Tue, Dec 27, 2016 at 1:00 AM, Kathryn Sellwood - NOAA Affiliate <
> kathryn.sellwood at noaa.gov> wrote:
>
>> "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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>>
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