[R] Calculate area under a curve

[stephen sefick]

simp() in the StreamMetabolism package may do the trick.  I have used
this on time series of chemical constituent masses.
hth,

Stephen Sefick

On Thu, Jul 1, 2010 at 9:56 AM, suse <meyfarth at uni-potsdam.de> wrote:
>
> Hi,
>
> I want to know the area under a curve, which is not given as a function, but
> as values in a time series. It is  not a smooth curve, but switches often
> between positive values and zero (the values describe the moisture in the
> soil over a year, one entry is one day). I already tried
> area.between.curves, but got only 0 as result. I guess, it doesn't work
> because of these multiple changes between 0 and positive values (most of the
> time, the values are 0 and in the certain case I tested, the positive values
> were only on single days; but for other values positive values last longer)
> I hope, someone can help me!
>
> THank you!
> --
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-- 
Stephen Sefick
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