[gradsusr] Sum daily values for precipitation

[Rafanoharana Serge Claudio]

On Wed, Jun 22, 2011 at 9:45 AM, gabriel gavinho
<gavinho.gabriel at gmail.com>wrote:

> Dear Serge,
>
> The solution you proposed did solve the problem envolving the plot of both
> variables, but it displays a straight line with the final result for
> accumulated precipitation instead of the increasing line presenting the
> gradual accumulation. Do you know how can I sort this out?
> still, thank you very much for your help,
>
> regards
>
> Gabriel Gavinho
> Federal University of Rio de Janeiro
>
> 2011/6/21 Rafanoharana Serge Claudio <rafanoharana at gmail.com>
>
>> Dear Gabriel,
>>
>> In order to obtain the total precipitation within a month, you can just
>> 'define acc=sum(pcp, t=1, t=31)'.
>> If I really understand what you want is that you would like to display
>> both daily and accumulation within one graphic. If so, it's a little bit
>> tricky but what I can suggest is that if you want to display both within one
>> graphic, try to set gxout linefill since linefill can deal with 2 variables,
>> then go back to set gxout line so it will be something like:
>>
>> 'sdfopen file.nc'
>> 'set lat -23'
>> 'set lon -45'
>> 'set t 1 31'
>>
>> 'define acc=sum(pcp, t=1, t=31)'
>> 'set gxout linefill'
>> 'set lfcols 0 0'    (----> this is black color and you can refer to
>> http://www.iges.org/grads/gadoc/colorcontrol.html)
>> 'd pcp;acc'         (up til here, you have only the x and y value, without
>> the graphs, so you need to plot the graph)
>> 'set gxout line'
>> 'set ccolor 3'
>> 'd pcp'
>> 'set ccolor 5'
>> 'd acc'
>>
>> Hope this can help,
>>
>>
>> Regards,
>>
>> Serge
>>
>> 2011/6/21 gabriel gavinho <gavinho.gabriel at gmail.com>
>>
>>> Dear Serge,
>>>
>>> I belive I did not make myself clear about the graphic I need.
>>> suppose I select a single point, let's say lat -23 lon -45, and set the
>>> time to a month period, I will have the values of precipitation for each day
>>> as it is in any meteogram.
>>> My problem is that I need to continually sum the daily valeus so I can
>>> achive the total precipitation within a month but in a way I can present an
>>> increasing line in over the daily values.
>>> I hope I could make it clear and I really appreciate your help
>>>
>>> Regars,
>>> Gabriel Gavinho
>>> Federal University of Rio de Janeiro.
>>>
>>>
>>> 2011/6/21 Rafanoharana Serge Claudio <rafanoharana at gmail.com>
>>>
>>>> Dear Gabriel,
>>>>
>>>> What do you mean by "in the same graphic"? because I think it will
>>>> depends on that. For your precipitation data, if you set your gxout to
>>>> shaded, I think you won't see both values, but if you set your gxout, for
>>>> example to contour, you'll be able to see both.
>>>>
>>>> Let's say your precipitaion variable is "pcp". It will be something
>>>> like:
>>>> 'sdfopen file.nc'
>>>> 'set gxout contour'
>>>> 'define acc=sum(pcp, t=1, t=31)'
>>>> 'd pcp'
>>>> 'd acc'
>>>>
>>>> So if you need for the day 17, just set t to 17 by adding 'set t 17'
>>>> right after 'sdfopen...'
>>>> In addition, you can write your accumulation variable to your file using
>>>> 'set sdfwrite file.nc' followed by 'sdfwrite acc'.
>>>> Maybe the following will give you more info.
>>>>
>>>> I quote from Bob Kuligowski:
>>>>
>>>> "GrADS can produce numerous types of file displays using gridded data
>>>> using set gxout:
>>>>
>>>> bar    (bar chart)
>>>> line    (line graph)
>>>> barb    (wind barbs)
>>>> linefill (color fill between two lines)
>>>> contour    (contour plot)
>>>> scatter    (scatter plot)
>>>> errbar    (error bars)
>>>> shaded    (shaded contour plot)
>>>> grfill    (shaded grid boxes)
>>>> stream    (wind streamlines)
>>>> fgrid    (grid boxes shaded for specified values)
>>>> vector    (wind vector arrows)
>>>> grid    (grid boxes with printed values)"
>>>>
>>>> Hope it can help,
>>>>
>>>> Regards,
>>>>
>>>> Serge
>>>>
>>>>
>>>>
>>>> 2011/6/21 gabriel gavinho <gavinho.gabriel at gmail.com>
>>>>
>>>>> Dear Users
>>>>>
>>>>> I am having a hard time trying to sum the values for daily
>>>>> precipitation during a month, in order put together both daily values and
>>>>> the accumulative sum in the same graphic
>>>>>
>>>>> Can you help me?
>>>>>
>>>>> regards!
>>>>>
>>>>> Gabriel Gavinho
>>>>> Federal University of Rio de Janeiro
>>>>>
>>>>> _______________________________________________
>>>>> gradsusr mailing list
>>>>> gradsusr at gradsusr.org
>>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Serge
>>>>
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>>>>
>>>>
>>>
>>
>>
>> --
>> Serge
>>
>
>


-- 
Serge
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