plot.units: Plot 'units' objects

In units: Measurement Units for R Vectors

Plot units objects

Description

Create axis label with appropriate labels.

Plot method for units objects.

Usage

make_unit_label(lab, u, sep = units_options("sep"),
  group = units_options("group"), parse = units_options("parse"))

## S3 method for class 'units'
plot(x, y, xlab = NULL, ylab = NULL, ...)

Arguments

lab	length one character; name of the variable to plot
u	vector of class units
sep	length two character vector, defaulting to c("~","~"), with the white space between unit name and unit symbols, and between subsequent symbols.
group	length two character vector with grouping symbols, e.g. c("(",")") for parenthesis, or c("","") for no group symbols
parse	logical; indicates whether a parseable expression should be returned (typically needed for super scripts), or a simple character string without special formatting.
x	object of class units, to plot along the x axis, or, if y is missing, along the y axis
y	object to plot along the y axis, or missing
xlab	character; x axis label
ylab	character; y axis label
...	other parameters, passed on to plot.default

Details

units_options can be used to set and change the defaults for sep, group and doParse.

Examples

displacement = mtcars$disp * as_units("in")^3
units(displacement) = make_units(cm^3)
weight = mtcars$wt * 1000 * make_units(lb)
units(weight) = make_units(kg)
plot(weight, displacement)

units_options(group = c("(", ")") )  # parenthesis instead of square brackets
plot(weight, displacement)

units_options(sep = c("~~~", "~"), group = c("", ""))  # no brackets; extra space
plot(weight, displacement)

units_options(sep = c("~", "~~"), group = c("[", "]"))
gallon = as_units("gallon")
consumption = mtcars$mpg * make_units(mi/gallon)
units(consumption) = make_units(km/l)
plot(displacement, consumption) # division in consumption

units_options(negative_power = TRUE) # division becomes ^-1
plot(displacement, consumption)

plot(1/displacement, 1/consumption)

units documentation built on May 29, 2024, 10:24 a.m.