[R] area under the curve

[Rolf Turner]

On 16/08/11 05:07, Mariana Varela wrote:
> HI there, I have been trying to use a code posted on R help to be able to calculate area under the curve for complicated data points and there seems to be an issue with the code: no "b" object found. I am not a good R user and can't find were the problem is. Any help? Thanks!!
> This is the code ( as a test run I gave it this info because I know the answer:
> x<-seq(1:50)
>   y<-seq(1:50)

There is nothing wrong with the code, except for a few typographical errors
in the code *as you posted it*.  (A missing "^" and a missing line feed.)

How did you actually call simp()?  Your posting does not show this.

With your x and y (why wrap the 1:50 up in seq()? just x <- 1:50 is
what is required) I get

 > simp(y,x=x)
[1] 1249.5

(which is the right answer! :-) )

     cheers,

         Rolf Turner