groupHist {berryFunctions}

Histogram for classes

Description

Improvement of tapply(x, g, hist) with x and g taken from a data.frame

Usage

groupHist(
  df,
  x,
  g,
  xlab = "",
  ylab = "",
  breaks = 20,
  las = 1,
  main = NULL,
  unit = NA,
  col = "purple",
  ...
)

Arguments

df

data.frame object name

x

column name of variable of interest

g

column name of groups (INDEX in tapply, f in split)

xlab, ylab

axis labels. DEFAULT: ""

breaks

hist breaks. DEFAULT: 20

las

LabelAxisStyle, see par. DEFAULT: 1, means numbers on y-axis upright

main

Main title, internal default based on d, x, unit and g. DEFAULT: NULL

unit

Unit to be written into the default title. DEFAULT: NA

col

Color vector to be used, recycled.

...

further arguments passed to hist

Details

Uses split to categorize into groups.

Value

NULL, used for plotting

Author(s)

Berry Boessenkool, [e-mail], Jan 2015

See Also

hist, tapply

Examples

groupHist(chickwts, weight, "feed", col="salmon")
groupHist(chickwts, "weight", "feed", col=2, unit="grams at age 6 weeks")
groupHist(chickwts, weight, feed, col="khaki", breaks=5, main="Hi there")
groupHist(iris, Petal.Width, Species)