## Plot method for objects of type Bolstad

### Description

A unified plotting method for plotting the prior, likelihood and posterior from any of the analyses in the book

### Usage

## S3 method for class 'Bolstad'
plot(
x,
overlay = TRUE,
which = c(1, 3),
densCols = c("red", "green", "blue")[which],
legendLoc = "topleft",
scaleLike = FALSE,
xlab = eval(expression(x$name)), ylab = "", main = "Shape of prior and posterior", ylim = c(0, max(cbind(x$prior, x$likelihood, x$posterior)[, which]) * 1.1),
cex = 0.7,
...
)


### Arguments

 x A S3 object of class Bolstad overlay if FALSE then up to three plots will be drawn side-by-side which Control which of the prior = 1, likelihood = 2, and posterior = 3, are plots. This is set to prior and posterior by default to retain compatibility with the book densCols The colors of the lines for each of the prior, likelihood and posterior legendLoc The location of the legend, usually either "topright" or "topleft" scaleLike If TRUE, then the likelihood will be scaled to have approximately the same maximum value as the posterior xlab Label for x axis ylab Label for y axis main Title of plot ylim Vector giving y coordinate range cex Character expansion multiplier ... Any remaining arguments are fed to the plot command

### Details

The function provides a unified way of plotting the prior, likelihood and posterior from any of the functions in the library that return these quantities. It will produce an overlay of the lines by default, or separate panels if overlay = FALSE.

James Curran

### Examples


x = rnorm(20,-0.5,1)
## find the posterior density with a N(0,1) prior on mu
b = normnp(x,sigma=1)
plot(b)
plot(b, which = 1:3)
plot(b, overlay = FALSE, which = 1:3)