exact2x2Plot: Plot p-value function for one 2 by 2 table.

In exact2x2: Exact Tests and Confidence Intervals for 2x2 Tables

Plot p-value function for one 2 by 2 table.

Description

Plots two-sided p-values as a function of odds ratios. Can plot three types of p-values: the two-sided Fisher's exact, the central Fisher's exact (i.e., twice the one-sided Fisher's exact), and Blaker's exact.

Usage

exact2x2Plot(x, y=NULL, OR = NULL, ndiv = 1000, tsmethod=NULL,
    method = NULL, paired=FALSE, orRange = NULL, dolog = TRUE,
    dolines = FALSE, dopoints = TRUE, doci=TRUE,  
    alternative=c("two.sided","less","greater"),
    conf.level=.95, alphaline=TRUE, newplot = TRUE, ...)

Arguments

x	matrix representing the 2 by 2 table
y	a factor object; ignored if x is a matrix.
OR	odds ratio values for plot, if NULL divides orRange into ndiv pieces
ndiv	number of pieces to divide up odds ratio range
tsmethod	either "minlike","blaker" or "central"
method	same as tsmethod, kept for backward compatability
paired	logical, do paired analysis giving McNemar's test p-values
orRange	range for calculating odds ratios
dolog	logical,plot odds ratios on log scale?
dolines	logical, add lines to a plot?
dopoints	logical, add points to a plot?
doci	logical, add vertical lines at confidence interval?
alternative	one of "two.sided","less","greater", type of alternative for p-values
conf.level	when doci=TRUE, level for confidence interval to be plotted
alphaline	logical, if doci=TRUE should a line be drawn at the significance level?
newplot	logical,start a new plot?
...	values passed to plot, points, or lines statement

See Also

exact2x2

Examples

example1<-matrix(c(6,12,12,5),2,2,dimnames=list(c("Group A","Group B"),c("Event","No Event")))
example1
exact2x2Plot(example1)
## add lines from central Fisher's exact
exact2x2Plot(example1,method="central",dolines=TRUE,newplot=FALSE,col="red")

exact2x2 documentation built on May 29, 2024, 10:51 a.m.