RcmdrMisc (version 2.9-1)

indexplot: Index Plots

Description

Index plots with point identification.

Usage

indexplot(x, groups, labels = seq_along(x), id.method = "y", type = "h", 
    id.n = 0, ylab, legend="topright", title, col=palette(), ...)

Value

Returns labelled indices of identified points or (invisibly) NULL if no points are identified or if there are multiple variables with some missing data.

Arguments

x

a numeric variable, a matrix whose columns are numeric variables, or a numeric data frame; if x is a matrix or data frame, plots vertically aligned index plots for the columns.

labels

point labels; if x is a data frame, defaults to the row names of x, otherwise to the case index.

groups

an optional grouping variable, typically a factor (or character or logical variable).

id.method

method for identifying points; see showLabels.

type

to be passed to plot.

id.n

number of points to identify; see showLabels.

ylab

label for vertical axis; if missing, will be constructed from x; for a data frame, defaults to the column names.

legend

keyword (see link[grapics]legend) giving location of the legend if groups are specified; if legend=FALSE, the legend is suppressed.

title

title for the legend; may normally be omitted.

col

vector of colors for the groups.

...

to be passed to plot.

Author

John Fox

See Also

showLabels, plot.default

Examples

if (require("car")){
    with(Prestige, indexplot(income, id.n=2, labels=rownames(Prestige)))
    indexplot(Prestige[, c("income", "education", "prestige")], 
        groups = Prestige$type, id.n=2)
}