logSpaced: Logarithmically spaced points

Description

Calculates values that are in logarithmic distance from each other e.g. to produce logarithmic interval borders.
For exact logarithmic spacing, use 10^seq(from=log10(1), to=log10(100), len=100)

Usage

logSpaced(
  base = 1.1708,
  n = 20,
  min = 1,
  max = n,
  plot = TRUE,
  pch = 3,
  las = 1,
  ylab = "base",
  ...
)

Value

Vector or matrix, depending on base input

Arguments

base: Base for calculations, can be a vector to compare several bases. DEFAULT: 1.1708
n: Number of values to be calculated. DEFAULT: 30
min, max: Range where n values are to be distributed, single values each. DEFAULT: 1,n
plot: Should the points be plotted on a line? DEFAULT: TRUE
pch, las: PointCharacter and Label Axis Style. DEFAULT: 3,1
ylab: Y axis label. DEFAULT: "base"
...: Further arguments passed to plot

Author

Berry Boessenkool, berry-b@gmx.de, Oct 2014

Examples

Run this code


logSpaced()
logSpaced(base=c(1.1, 1.5, 2), n=6, min=5, max=10)
d <- logSpaced(seq(0.8, 1.2, 0.025), main="logarithmically spaced points")

# the default base for the default n (20) will give an approximately equal
# bin width across the range on a logarithmic scale:
d <- logSpaced()
plot(d, rep(1,20), log="x")

# For exactly spacing logarithmically, use
plot(10^seq(from=log10(1), to=log10(100), len=100), log="y")