scaleDMean {lmfor}

The Weibull scale parameter for the given mean/median diameter and shape parameter.

Description

The function finds such scale parameter of the Weibull distribution that yields the given mean/median diameter. Function scaleDMean is used for arithmetic mean, scaleDGMean for the mean of basal-area weighted distribution, scaleDMed for median and scaleDGMed for the median of the basal-area weighted diameter distribution. Functions with number 1 in the name use Weibull functions as the unweighted density and functions with value 2 in the name use Weibull function as the basal-area weighted density.

The functions are used in the recovery of Weibull parameters using function recweib.

Usage

scaleDMean1(D,shape)
scaleDGMean1(D,shape)
scaleDMed1(D,shape)
scaleDGMed1(D,shape)
scaleDMean2(D,shape)
scaleDGMean2(D,shape)
scaleDMed2(D,shape)
scaleDGMed2(D,shape)

Arguments

D

The diameter

shape

The Weibull shape parameter

Value

scale

The value of the Weibull scale parameter.

Author(s)

Lauri Mehtatalo <[e-mail]> and Jouni Siipilehto

References

Siipilehto, J. and Mehtatalo, L. 2013. Parameter recovery vs. parameter prediction for the Weibull distribution validated for Scots pine stands in Finland. Silva Fennica 47(4), article id 1057. doi:10.14214/sf.1057

See Also

recweib

Examples

scaleDMean1(15,3)
scaleDGMean1(15,3)
scaleDMed2(15,3)
scaleDGMed2(15,3)