[gradsusr] gr2stn() doesn't match plot

[Miquel Bernis]

Gràcies per la resposta Oriol! El que intento és simplement crear una
interpolació per a una estació concreta. Feia això del mapa per comparar el
resultat i veure que era correcta. Sembla clar que no entenc la funció
gr2stn(). Si el que em demana és una malla, el que jo interpreto és que
hauria de deixar LAT i LON sense fixar, però si ho faig així apareix aquest
error

ga-> d gr2stn(ps,41.2,2.2)
Error from GR2STN: 2nd argument is not a station expression

No ho caço.

>>>>

What I'm trying to do is just interpolate to an specific station. I made
the plot thing in order to check if the interpolation matched more or less
with what I see on the map. Seems clear that I don't get the gr2str
function. If the first parameter must be a grid, I understand that
shouldn't attach lat and lon, but if I don't do that get this error message:

 ga-> d gr2stn(ps,41.2,2.2)
Error from GR2STN: 2nd argument is not a station expression

don't get it.

2014-11-17 19:16 GMT+01:00 Oriol Ciurana <uri at uriens.cat>:

> Hola Miquel,
>
> No entenc exactament què pretens fer, a veure si ho entenc. Sembla que
> primer estiguis pintant un mapa de temperatures i després vulguis obtenir
> el valor numèric d'un punt geogràfic concret. Si és així, és més fàcil,
> fixa la LAT i la LON al punt que desitgis i fes directament un "d
> tsfc-273.15", això directament et donarà el valor numèric a la consola.
>
> La funció gr2stn admet com a primer paràmetre una malla i no un paràmetre,
> mira't bé la definició, crec que no la tens ben entesa:
> http://www.iges.org/grads/gadoc/gradfuncgr2stn.html
>
> A reveure,
>
> Oriol
>
> 2014-11-17 17:27 GMT+01:00 Miquel Bernis <bernisfeina at gmail.com>:
>
>> Hi everyone,
>>
>> I'm running grads 2.0.a9 on a Virtual Machine Ubuntu 12.04
>>
>> I'm sorry because I'm new using the software and maybe this is a quite
>> basic question. I would like to ask you about the function gr2stn(), my
>> problem is that when I try to compare the results of ploting any variable,
>> with the results of using gr2stn for an specific point doesn't seem to
>> match. Using the example model.ctl of the basic grads tutorial it seems
>> that tsfc-273 on the label 1000 rounds 10 degrees (more or less) on 42N 2E,
>> but when I lock lat and lon, the result of using gr2stn() get me to a 26.8,
>> which is no quite the expected. It's the same in other labels, variables,
>> and even with other files. Does anybody know what I'm doing wrong?
>>
>> Thanks for reading. I would appreciate your help.
>> Miquel
>>
>>
>> ga-> d tsfc-273
>> Contouring: -0 to 18 interval 2
>> ga-> s gxout print
>> Unknown command: s
>> ga-> set gxout print
>> ga-> set lat 0
>> LAT set to 0 0
>> ga-> set lon 0
>> LON set to 0 0
>> ga-> d gr2stn(tsfc-273,42.2,2.1)
>> Printing Stations -- 1 Reports -- Undef = -9.99e+08
>> xxxxxxxx 42.2      2.1       1000
>> 26.8196
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20141117/37e0227e/attachment.html