Plot Means Factorial

Provides a plot of all group or level means and their confidence intervals in a factorial or mixed design.

Usage

# S3 method for data.frame
plotMeans(frame, by, ylab="Outcome", xlab="", conf.level=.95)

# S3 method for formula
plotMeans(formula, by, ylab="Outcome", xlab="", conf.level=.95)

# S3 method for wsm
plotMeans(moments, ylab="Outcome", xlab="", conf.level=.95)

# S3 method for bsm
plotMeans(moments, ylab="Outcome", xlab="", conf.level=.95)

Arguments

frame

a set of (non-empty) numeric vectors of data values

formula

a formula of the form lhs ~ rhs where lhs is a numeric variable giving the data values and rhs a factor giving the corresponding groups

moments

a matrix/frame of descriptive/summary statistics

by

a blocking factor

ylab

a label for the y-axis

xlab

a label for the x-axis

conf.level

confidence level of the interval

Value

The returned plot contains the following components:

M

the means for the variables or groups

LL

the lower limits of the confidence intervals of the means

UL

the upper limits of the confidence intervals of the means