[R] Plotting probability density and cumulative distribution function

[R. Michael Weylandt <michael.weylandt@gmail.com>]

Perhaps I misunderstand you, but it sounds like all you need to do is change weibull to the name of another distribution 

Michael

On Jan 17, 2012, at 8:11 AM, chrisr34000 <crisr at wolke7.net> wrote:

> Hi!
> 
> I want to plot the probability density function and the cumulative
> distribution function for the gamma, lognormal, exponential and Pareto
> distribution. I want to vary the parameters and and have a plot with 2-3
> different parameters in the same figure. It should look like this (example
> weibull distribution):
> 
> http://en.wikipedia.org/wiki/File:Weibull_PDF.svg
> 
> library(Cairo)
> CairoFonts(regular="DejaVu Sans:style=Regular")
> CairoSVG("Weibull PDF.svg")
> par(mar=c(3, 3, 1, 1))
> x <- seq(0, 2.5, length.out=1000)
> plot(x, dweibull(x, .5), type="l", col="blue", xlab="", ylab="", xlim=c(0,
> 2.5), ylim=c(0, 2.5), xaxs="i", yaxs="i")
> lines(x, dweibull(x, 1), type="l", col="red")
> lines(x, dweibull(x, 1.5), type="l", col="magenta")
> lines(x, dweibull(x, 5), type="l", col="green")
> legend("topright", legend=paste("\u03bb = 1, k =", c(.5, 1, 1.5, 5)), lwd=1,
> col=c("blue", "red", "magenta", "green"))
> dev.off()
> 
> and
> 
> http://en.wikipedia.org/wiki/File:Weibull_CDF.svg
> 
> library(Cairo)
> CairoFonts(regular="DejaVu Sans:style=Regular")
> CairoSVG("Weibull CDF.svg")
> par(mar=c(3, 3, 1, 1))
> x <- seq(0, 2.5, length.out=1000)
> plot(x, pweibull(x, .5), type="l", col="blue", xlab="", ylab="", xlim=c(0,
> 2.5), ylim=c(0, 1), xaxs="i", yaxs="i")
> lines(x, pweibull(x, 1), type="l", col="red")
> lines(x, pweibull(x, 1.5), type="l", col="magenta")
> lines(x, pweibull(x, 5), type="l", col="green")
> legend("bottomright", legend=paste("\u03bb = 1, k =", c(.5, 1, 1.5, 5)),
> lwd=1, col=c("blue", "red", "magenta", "green"))
> dev.off()
> 
> How do I adapt the syntax to use it for the other distributions?
> 
> 
> 
> --
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> 
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