cwhmisc (version 2.1)

f.log: Determine an optimized offset s and return log10(data+s).

Description

f.log determines a positive offset s for zero values to be used in a subsequent log transformation.

Usage

f.log(x)

Arguments

x

vector of data.

Value

• The transformed values log10(data + s).

Examples

x <- c(rep(0,20), exp(rnorm(1000)))
  fx <- f.log(x)
oldpar <- par(mfrow = c(2, 3))
  plot(x)
  qqnorm(x)
  T3plot(x)
  plot(fx)
  qqnorm(fx)
  T3plot(fx)
  par(oldpar)