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

[Lyndon Mark Olaguera]

Dear Jennifer,

I tried your suggestion and got the following values:

Data Type = grid
Dimensions = 0 3
I Dimension = 33 to 35 Linear 80 2.5
J Dimension = 43 to 44 Linear 00Z01AUG1975 7200mn
Sizes = 3 2 6
Undef value = -9.99e+08
Undef count = 0  Valid count = 6
Min, Max = -10.8831 6.05715
*Cmin, cmax, cint = -10 6 2*

The Cmin and Cmax is actually what I was looking for. Is there a way to get
their location from the 2D plot? The equivalent grid coordinates?


Many thanks for the help,

Lyndon Mark



On Tue, Jan 10, 2017 at 5:12 AM, Jennifer M Adams <jadams21 at gmu.edu> wrote:

> The min and max values of any displayed grid will appear in the output
> when using ‘set gxout stat’ or ’set stat on'. —Jennifer
>
> On Dec 26, 2016, at 8:55 PM, 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_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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>>>
>>
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>
> --
> Jennifer Miletta Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> George Mason University
>
>
>
>
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