Graphical Units

Description

xinch and yinch convert the specified number of inches given as their arguments into the correct units for plotting with graphics functions. Usually, this only makes sense when normal coordinates are used, i.e., no log scale (see par(log=..)).

xyinch does the same for a pair of numbers xy, simultaneously.

cm translates inches in to cm (centimeters).

Usage

xinch(x=1, warn.log=TRUE)
yinch(y=1, warn.log=TRUE)
xyinch(xy=1, warn.log=TRUE)
cm(x)

Arguments

Examples

all(c(xinch(),yinch()) == xyinch()) # TRUE
xyinch()
xyinch #- to see that is really   delta{"usr"} / "pin"

cm(1)# = 2.54

## plot labels offset 0.12 inches to the right
## of plotted symbols in a plot
data(mtcars)
attach(mtcars)
plot(mpg, disp, pch=19, main= "Motor Trend Cars")
text(mpg + xinch(0.12), disp, rownames(mtcars),adj=0, cex = .7, col='blue')
detach(mtcars)