[R] Function from ecdf to ccdf

[David Winsemius]

On Apr 24, 2012, at 4:47 AM, Alaios wrote:

> Dear all,
> I would like to calculate the complementary cumulative distribution  
> function. As it is known, the ccdf is the 1-ecdf(X)==1-F(x). (From ? 
> ecdf help is shown that ecdf returns a function which is the F(x)
>
> I would like to use that function inside my function and after call  
> curve (which accepts function as input). My code looks like that
>
>
> onVector<-seq(1:100)
> offVector<-seq(101:200)

Heh, .... I've made that mistake myself. It's a difficult one for the  
brain to catch. Unfortunately it does not throw an error. (Arguably  
this is an infelicity that should be flagged with at least a warning.)

> myecdfOn<-function(onVector){1-ecdf(onVector)} # This gives the ccdf

I do not think it does. Have your tried to do anything with it?
>
> curve(myecdfOn,from=1,to=max(c(onVector,offVector)), add=TRUE,lwd=2)
>
> Unfortunately fails and I can not really see what is he problem of it.

Try reading the error message more closely (... and next time post it.)
>


-- 

David Winsemius, MD
West Hartford, CT