[gradsusr] Sum daily values for precipitation

[Rafanoharana Serge Claudio]

Dear Gabriel,

Can you be more specific about this increasing line presenting the gradual
accumulation? Since let's say, for one month, the accumulated precipitation
is the sum of the precipitation, so that it comes up  with a straight line.

Best regards,

Serge



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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>>>> gradsusr at gradsusr.org
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>>>>
>>>>
>>>
>>
>>
>> --
>> Serge
>>
>
>


-- 
Serge
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