Description

Performs the Hellinger data transformation (square root of sample total standardized data).

Usage

Arguments

Details

Calculates a sample total standardization (all values in a row are divided by the row sum), and then takes the square root of the values.

Value

A community data.frame

Note

Hellinger standardization is a convex standardization that simultaneously helps minimize effects of vastly different sample total abundances.

Author(s)

David W. Roberts droberts@montana.edu http://ecology.msu.montana.edu/droberts/droberts.html

References

http://ecology.msu.montana.edu/labdsv/R

See Also

spcmax, samptot, abundtrans

Examples