[R] cumulative data monthly

[Jeff Newmiller]

Are you looking for a plot where each point represents a month? Or a plot  where each point represents the accumulated precipitation so far that month? The latter seems closer to your computations so far, but doesn't seem like a typical way to present precipitation data...

On January 27, 2019 7:25:17 AM PST, Diego Avesani <diego.avesani using gmail.com> wrote:
>Dear all,
>
>I have a set of data with has hourly value:
>
># ID
># Lo
># L
># Q
>Time,    T, RH,PSFC,DIR,VEL10, PREC, RAD, CC,FOG
>yyyy-mm-dd hh:mm,   °C,  %, hPa, °N,  m/s, mm/h,W/m²,  %,-
>2012-01-01 06:00, -0.1,100, 815,313,  2.6,  0.0,   0,  0,0
>2012-01-01 07:00, -1.2, 93, 814,314,  4.8,  0.0,   0,  0,0
>2012-01-01 08:00,  1.7, 68, 815,308,  7.5,  0.0,  41, 11,0
>2012-01-01 09:00,  2.4, 65, 815,308,  7.4,  0.0, 150, 33,0
>.....
>.....
>
>I was able to read it,  create my-own data frame and to plot the total
>cumulative function.
>This is basically what I have done:
>
>dati <- read.csv(file="116.txt", header=FALSE, sep="," ,
>na.strings="-999",skip = 6)
>colnames(dati)=c("DATAORA","T", "RH","PSFC","DIR","VEL10", "PREC",
>"RAD",
>"CC","FOG")
>
>dati$DATAORA<-as.POSIXct(strptime(dati$DATAORA,format="%Y-%m-%d
>%H:%M"))
>
>
>P <- cumsum(dati$PREC)
>plot(dati$DATAORA, P)
>
>I would like to select the data according to an starting and ending
>date.
>In addition, I would like to plot the monthly and not the total one.
>I mean, I would like to have a cumulative plot for each month of the
>selected year.
>
>I am struggling with "ddply" but probably it is the wrong way.
>
>Could someone help me?  Really Really thanks,
>
>
>Diego
>
>	[[alternative HTML version deleted]]
>
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-- 
Sent from my phone. Please excuse my brevity.