plotmix.pois: Histogram of the observations and the fitted probability mass...

Description Usage Arguments Value Author(s) See Also Examples

Description

Plot the histogram of the observations and the fitted probability mass function of a mixture of Poissons.

Usage

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plotmix.pois(x, theta, hist = 1, comp = TRUE, h = 1, main = "",
             xlab = "Observations", ylab = "")

Arguments

x

data, can be either a vector or a matrix with the 1st column being the observed values and the 2nd column being the corresponding frequencies.

theta

parameter values, output of emtest.pois or pmle.pois, or a vector of parameter values, include mixing proportions and component parameters.

hist

style of histogram. hist = 0,1,2 are permitted. hist = 0 means no histogram, hist = 1,2 give two styles, default value: hist = 1.

comp

a parameter specifies the form of the component probability functions in the graph. The component probability functions will be plotted only if the order is 3 or lower. comp = T switches on the component probability functions in the graph. If comp = F, no component probability functions will be included. default value: comp = T.

h

a number between 0 and 1, specifying the height of the probability function, default value: h=1 (complete probability function).

main

title of graph, default value: main = "".

xlab

label of x-axis, default value: xlab = "Observations".

ylab

label of y-axis, default value: ylab = "".

Value

Return the histogram of the observations and the plot of the fitted probability mass function.

Author(s)

Shaoting Li, Jiahua Chen and Pengfei Li

See Also

emtest.pois, pmle.pois, rmix.pois

Examples

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#generate a random sample from a 2 component Poisson mixture, 
#plot the histogram of the observations and the probability mass function with a set of 
#given parameters.
x <- rmix.pois(200,c(0.3,0.7),c(2,5))
theta <- c(0.25,0.75,1.8,5.2)
plotmix.pois(x,theta)


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