[R] cumulative frequency distribution plot
Wiener, Matthew
matthew_wiener at merck.com
Tue Jun 24 20:55:35 CEST 2003
You can also take a look at "ecdf" in the "stepfun" package.
Hope this helps,
Matt
-----Original Message-----
From: Spencer Graves [mailto:spencer.graves at pdf.com]
Sent: Tuesday, June 24, 2003 2:39 PM
To: Tommy E. Cathey
Cc: r-help at r-project.org
Subject: Re: [R] cumulative frequency distribution plot
It depends on what you mean by that. Consider the following:
> x <- rnorm(100)
> plot(x, pnorm(x))
This plot is a cdf of pseudo-normal data.
I've seen many people make these things, and I've never understoon
what they see in these plots that they can't see better in a normal
probability plot:
> qqnorm(x, datax=T)
What can you see in the first type plot that is not so easily seen
in
the second?
Spencer Graves
Tommy E. Cathey wrote:
> Does R do cumulative frequency distribution plots?
>
> --
> Tommy E. Cathey, Senior Scientific Application Consultant
> High Performance Computing & Scientific Visualization
> SAIC, Supporting the EPA
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