mosaic (version 1.9.1)

freqpoly: Turn histograms into frequency polygons

Description

Turn histograms into frequency polygons

Usage

freqpoly(x, plot = TRUE, ...)
hist2freqpolygon(hist)
# S3 method for freqpolygon
plot(
  x,
  freq = equidist,
  col = graphics::par("fg"),
  lty = NULL,
  lwd = 1,
  main = paste("Frequency polygon of", paste(x$xname, collapse = "\n")),
  sub = NULL,
  xlab = x$xname,
  ylab,
  xlim = range(x$x),
  ylim = NULL,
  axes = TRUE,
  labels = FALSE,
  add = FALSE,
  ann = TRUE,
  ...
)

Value

An object of class "freqpoly" (invisibly). Additionally, if plot is TRUE, a plot is generated.

Arguments

x

a vector of values for which a frequency polygon is desired.

plot

a logical indicating if a plot should be generated.

...

additional arguments passed on to hist().

hist

a histogram object produced by link{hist}().

freq

A logical indicating whether the vertical scale should be frequency (count).

col

A color for the frequency polygon.

lty

An integer indicating the line type.

lwd

An integer indicating the line width.

main

A title for the plot.

sub

A sub-title for the plot.

xlab

Label for the horizontal axis.

ylab

Label for the vertical axis.

xlim

A numeric vector of length 2.

ylim

A numeric vector of length 2.

axes

A logical indicating whether axes should be drawn.

labels

A logical indicating whether labels should be printed or a character vector of labels to add.

add

A logical indicating whether the plot should be added to the current plot

ann

A logical indicating whether annotations (titles and axis titles) should be plotted.

Examples

freqpoly(faithful$eruptions)
bks <- c(0, 1, 1.5, 2, 3, 3.5, 4, 4.5, 5, 7)
hist(faithful$eruptions, breaks = bks)
freqpoly(faithful$eruptions, col = rgb(0,0,1,.5), lwd = 5, breaks = bks, add = TRUE)