[R] ggplot cumsum refined question (?)

[hadley wickham]

> It is much easier to do you data preparation before plotting.
>
> Cummul <- ddply(subset(DF, precipitation!="NA"), "gauge_name",
> function(x){
>        x$Cummul <- cumsum(x$precipitation)
>        x
> })

With a little less typing:

Cummul <- ddply(subset(DF, precipitation!="NA"), "gauge_name", transform,
  Cummul = cumsum(precipitation))

Hadley

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