[R] cumulative distribution functions
dmurdoch at pair.com
Mon Nov 17 20:05:10 CET 2003
On Mon, 17 Nov 2003 18:30:08 -0000, "Monica Palaseanu-Lovejoy"
<monica.palaseanu-lovejoy at stud.man.ac.uk> wrote :
>I am wondering if there is any special command, function,
>package, etc to help me doing a cumulative distribution function,
>with y-scale - probability scale.
>I tried the help in R and i got the following answers:
>cumsum(base) Cumulative Sums, Products, and Extremes
>ecdf(stepfun) Empirical Cumulative Distribution Function
>cpgram(ts) Plot Cumulative Periodogram
>But i could not find either (stepfun) nor (ts) packages to read the
>specific help. Are they discarded? The "cumsum" seems not to do
>what i really was after.
You need to execute "library(stepfun)" before help for ecdf will work.
In general, the notation is
and you need library(package) to see ?topic.
More information about the R-help