FinneyCorr {cwhmath}R Documentation

Finney's correction to log normally distributed data.

Description

FinneyCorr: Finney's correction factor K in x = e^{ln x} * K, with newline K = e^{s_{ln}^2/2} , <=ft{ 1-frac{s_{ln}^2}{4n}(s_{ln}^2+2)+frac{s_{ln}^4}{96n^2}(3s_{ln}^4+44s_{ln}^2+84) right} , to be used if ln x is normally distributed with standard deviation s_{ln x}. FC.lm, s.lm: Finney's correction and standard deviation extracted from an object of class "lm".

Usage

  FinneyCorr(s,n)
  FC.lm(lmobj)
  s.lm(lmobj)

Arguments

s Standard deviation of log data.
n Number of data points.
lmobj An object of class "lm".

Author(s)

Christian W. Hoffmann, christian.hoffmann@wsl.ch,
http://www.wsl.ch/staff/christian.hoffmann

References

Finney D.J., 1941. On the distribution of a variable whose logarithm is normally distributed. J. R. Stat. Soc., B 7: 155-161

Examples

FinneyCorr(0.346274,24+3)  #>  1.059306936
x <- rnorm(100); y <- rnorm(100)
lmo <- lm(y ~x)
FC.lm(lmo)
s.lm(lmo)

[Package cwhmath version 1.0.0 Index]