plotMeans: Plot Means for One or Two-Way Layout

In RcmdrMisc: R Commander Miscellaneous Functions

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)), 
    legend.pos=c("farright", "bottomright", "bottom", "bottomleft", 
                 "left", "topleft", "top", "topright", "right", "center"),
    main="Plot of Means",
    pch=1:n.levs.2, lty=1:n.levs.2, col=palette(), connect=TRUE, ...)

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.
legend.pos	Position of legend; if "farright" (the default), extra space is left at the right of the plot.
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
connect	connect profiles of means, default TRUE.
...	arguments to be passed to plot.

Value

The function invisibly returns NULL.

Author(s)

John Fox [e-mail]

See Also

interaction.plot

Examples

if (require(car)){
    data(Moore)
    with(Moore, plotMeans(conformity, fcategory, partner.status, ylim=c(0, 25)))
}

RcmdrMisc documentation built on Sept. 27, 2023, 1:06 a.m.