RcmdrMisc: plotDistr – R documentation

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plotDistr

Plot a probability density, mass, or distribution function.

Description

This function plots a probability density, mass, or distribution function, adapting the form of the plot as appropriate.

Usage

plotDistr(x, p, discrete=FALSE, cdf=FALSE, 
  regions=NULL, col="gray", 
  legend=TRUE, legend.pos="topright", ...)

Arguments

`x`	horizontal coordinates
`p`	vertical coordinates
`discrete`	is the random variable discrete?
`cdf`	is this a cumulative distribution (as opposed to mass) function?
`regions, col`	for continuous distributions only, if non-`NULL`, a list of regions to fill with color `col`; each element of the list is a pair of `x` values with the minimum and maximum horizontal coordinates of the corresponding region; `col` may be a single value or a vector.
`legend`	plot a legend of the regions (default `TRUE`).
`legend.pos`	position for the legend (see `legend`, default `"topright"`).
`...`	arguments to be passed to `plot`.

Value

Produces a plot; returns NULL invisibly.

Author(s)

John Fox jfox@mcmaster.ca

Examples

x <- seq(-4, 4, length=100)
plotDistr(x, dnorm(x), xlab="Z", ylab="p(z)", main="Standard Normal Density")
plotDistr(x, dnorm(x), xlab="Z", ylab="p(z)", main="Standard Normal Density",
    region=list(c(1.96, Inf), c(-Inf, -1.96)), col=c("red", "blue"))
plotDistr(x, dnorm(x), xlab="Z", ylab="p(z)", main="Standard Normal Density",
    region=list(c(qnorm(0), qnorm(.025)), c(qnorm(.975), qnorm(1)))) # same 

x <- 0:10
plotDistr(x, pbinom(x, 10, 0.5), xlab="successes", 
    discrete=TRUE, cdf=TRUE,
    main="Binomial Distribution Function, p=0.5, n=10")

RcmdrMisc

R Commander Miscellaneous Functions

v2.7-1

GPL (>= 2)

Authors

John Fox [aut, cre], Robert Muenchen [ctb], Dan Putler [ctb]

Initial release

2020-08-12