cwhmisc (version 6.0)

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(1000,0.05)))
  fx <- f.log(x)
 ## Not run: 
#   oldpar <- par(mfrow = c(2, 3))
#   plot(x,main="exp(normal)+zeros")
#   qqnorm(x)
#   T3plot(x)
#   plot(fx,main="optimized offset")
#   qqnorm(fx)
#   T3plot(fx)
#   par(oldpar)
#  ## End(Not run)