cumulative frequency distribution plot
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 Research Triangle Park, NC 919-541-1500 EMail: cathey.tommy at epa.gov My e-mail does not reflect the opinion of SAIC or the EPA. Federal Contact - John B. Smith 919-541-1087 - smith.johnb at epa.gov
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