[R] Area between 2 curves

[Keith Jewell]

A quick Google suggests that sintegral is in the Bolstad2 package: 
http://cran.r-project.org/web/packages/Bolstad2/

"R. Michael Weylandt" <michael.weylandt at gmail.com> wrote in message 
news:CAAmySGOCtNxWNHJDka=68CRiphxNPpWAp6fm7uFkHTx7XSZVTw at mail.gmail.com...
> You can't just decide a command exists and try to use it by your
> arbitrarily chosen name .... did you look at the function integrate()
> which does exist? It uses a smarter algorithm than Simpson's rule.
>
> Alternatively, Simpson's rule is very easy to code with vectorization
> -- you should be able to implement it yourself in just a few lines
> after reading "An Introduction to R".
>
> Michael
>
> On Mon, Apr 30, 2012 at 6:17 AM, sappy <robert.wittkopf at gmx.de> wrote:
>> Hello,
>>
>> i have a question calculating the shaped area between the two curves (see
>> image).
>>
>> http://r.789695.n4.nabble.com/file/n4597813/test.png
>>
>> I try to use a Simpson-Integral but it doesn't work. "R" doesn't know the
>> command!
>> It is possible, that i need a library?
>>
>> Curve 1: y
>> Curve 2: z
>>
>> q<-abs(y-z); est<-sintegral(x,z)
>>
>> Greetings
>>
>> --
>> View this message in context: 
>> http://r.789695.n4.nabble.com/Area-between-2-curves-tp4597813.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>