R: Plot Means for One or Two-Way Layout

plotMeans {Rcmdr}

R Documentation

Plot Means for One or Two-Way Layout

Description

Plots cell means for a numeric variable in each category of a factor or in each combination of categories of two factors, optionally along with error bars based on cell standard errors or standard deviations.

Usage

plotMeans(response, factor1, factor2,
    error.bars = c("se", "sd", "conf.int", "none"), level=0.95,
    xlab = deparse(substitute(factor1)),
    ylab = paste("mean of", deparse(substitute(response))), 
    legend.lab = deparse(substitute(factor2)), main = "Plot of Means", 
    pch = 1:n.levs.2, lty = 1:n.levs.2, col = palette(), ...)

Arguments

`response`	Numeric variable for which means are to be computed.
`factor1`	Factor defining horizontal axis of the plot.
`factor2`	If present, factor defining profiles of means
`error.bars`	If `"se"`, the default, error bars around means give plus or minus one standard error of the mean; if `"sd"`, error bars give plus or minus one standard deviation; if `"conf.int"`, error bars give a confidence interval around each mean; if `"none"`, error bars are suppressed.
`level`	level of confidence for confidence intervals; default is .95
`xlab`	Label for horizontal axis.
`ylab`	Label for vertical axis.
`legend.lab`	Label for legend.
`main`	Label for the graph.
`pch`	Plotting characters for profiles of means.
`lty`	Line types for profiles of means.
`col`	Colours for profiles of means
`...`	arguments to be passed to `plot`.

Value

The function invisibly returns NULL.

Author(s)

John Fox jfox@mcmaster.ca

Examples

with(Moore, plotMeans(conformity, fcategory, partner.status, ylim=c(0, 25)))

[Package Rcmdr version 1.8-4 Index]