scaleDMean function

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

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.

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

Returns

• scale: The value of the Weibull scale parameter.

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. tools:::Rd_expr_doi("10.14214/sf.1057")

Author(s)

Lauri Mehtatalo <lauri.mehtatalo@uef.fi > and Jouni Siipilehto

See Also

recweib

Examples

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