berryFunctions (version 1.6)

logAxis: label logarithmic axes

Description

shortcut to calling logVals, axis and abline

Usage

logAxis(side=1, log=NULL, lcol="grey", lty=1, lwd=1, expr, las=1, from=-7,
to=7, Range=range(from, to), base=c(1,2,5), big.mark="'", decimal.mark=".",
scientific=FALSE, ...)

Arguments

side

Which axis is to be labeled?. DEFAULT: 1

log

Is the axis logarithmic by plot(log="x")? internal DEFAULT: par("xlog") or "ylog". DEFAULT: NULL

lcol

Color of gridlines drawn in the graph with abline, NA to suppress. DEFAULT: "grey"

lty, lwd

Type of gridlines. DEFAULT: 1

expr

Expression drawing over the ablines, like (points(x,y). Can be code within {braces}.

las

LabelAxisStyle for the orientation of the labels. DEFAULT: 1

from

Lower exponent OR vector with data, as in logVals. DEFAULT: -7

to

High end exponent. DEFAULT: 7

Range

Override from and to as range. DEFAULT: range(from, to)

base

Bases to be used, eg. c(1,2,5) or 1. DEFAULT: c(1,2,5)

big.mark

Symbol separating thousands, eg. space, comma, dot, etc. see "format" and "prettyNum". DEFAULT: "'"

decimal.mark

Character separating comma values, see "format" and "prettyNum". DEFAULT: "."

scientific

See format. DEFAULT: FALSE

...

further arguments passed to axis, like lwd, col.ticks, hadj, lty, ...

Value

• An invisible list with
• vals
  Values for lines and label positions
• labs
  Formatted values for labels
• all
  Values for lines

See Also

logVals, log10

Examples

x <- 10^runif(200, -1, 2)
plot(x, 1:200, xaxt="n", log="x")
logAxis(base=1)
# overplot vertical lines:
logAxis(expr=points(x, 1:200), base=c(1,2,5), col=2 )

# plots where log="x" is not possible:
hist(log10(x), breaks=20, col.axis="grey", main="")
logAxis(side=3, expr=hist(log10(x),breaks=20,add=TRUE, col=3))