[R] Must be easy, but haven't found the function (numerical integration)

[bbolker]

On 9/17/07, Ptit_Bleu <ptit_bleu at yahoo.fr> wrote:
> I have a data frame of 2 columns with the following types :
> data$day char
> data$value num
>
> And I plot my data with :
> plot(strptime(donnees$day,format="%Y-%m-%d %H:%M:%S"),donnees$value,
> type="l")
>
> And I'd just like to get the numerical value of the integration of this
> graph.

  Would cumsum (which simply finds the cumulative sum of a vector) be
sufficiently
accurate for your purposes?

  Ben Bolker

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