[gradsusr] Sum daily values for precipitation

[gabriel gavinho]

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
>
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