[R] How to display the equation of ECDF

[Spencer Graves]

	  Just type "ecdf" at a command prompt like you type "pi" and get back 
3.141593.  hope this helps.  spencer graves

p.s.  Have you looked at "An Introduction to R" [available in the upper 
left after help.start() or on www.r-project.org -> Documentation -> 
Manuals?

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Yair Benita wrote:

 > I wanted to get the equation of the cumulative distribution. Looking 
through the manual I found the ecdf function used it as follows:
 >
 > x contains about 3000 real values. Here is my command line:
 >
 > plot.ecdf(ecdf(x))
 >
 > This gives me a plot with an exponential curve with a y axis of Fn(x) 
and I would like to see the equation of the function plotted.
 >
 > How can you type ecdf with no parantheses? it gives me an error. Can 
you give me an example?
 >
 > Thanks,
 > Yair
 >
 >
##########################
      Did you try typing "ecdf" (without the parentheses identifying it
as a function) at a prompt?  When I did that just now, I found that
"ecdf" calls "approxfun", and I could get a function definition by
typing that.

      hope this helps.
      spencer graves
p.s.  PLEASE do read the posting guide!
"http://www.R-project.org/posting-guide.html".  You might get the answer
quicker from following this guide.  If not, the exercise might help you
formulate your question in a way that might elicit more useful
response(s).

Yair Benita wrote:

> Hi,
> Using the ecdf (Empirical Cumulative Distribution Function) one can 
> compute a plot. I was wondering if there is a way to get the equation 
> used to draw the plot.
>
> thanks,
> Yair
>
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