indexplot: Index Plots
In RcmdrMisc: R Commander Miscellaneous Functions

indexplot

R Documentation

Index Plots

Description

Index Plots

Usage

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

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.
`groups`	an optional grouping variable, typically a factor (or character or logical variable).
`labels`	point labels; if `x` is a data frame, defaults to the row names of `x`, otherwise to the case index.
`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`	see `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`.

Details

Index plots with point identification.

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.

Author(s)

John Fox

Examples

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

RcmdrMisc documentation built on Jan. 8, 2026, 9:06 a.m.