AgroR (version 1.3.6)

transf: Utils: Data transformation (Box-Cox, 1964)

Description

Estimates the lambda value for data transformation

Usage

transf(response, f1, f2 = NA, f3 = NA, block = NA, line = NA, column = NA)

Value

Returns the value of lambda and/or data transformation approximation, according to Box-Cox (1964)

Arguments

response

Numerical vector containing the response of the experiment.

f1

Numeric or complex vector with factor 1 levels

f2

Numeric or complex vector with factor 2 levels

f3

Numeric or complex vector with factor 3 levels

block

Numerical or complex vector with blocks

line

Numerical or complex vector with lines

column

Numerical or complex vector with columns

Author

Gabriel Danilo Shimizu,

Leandro Simoes Azeredo Goncalves

Rodrigo Yudi Palhaci Marubayashi

References

Box, G. E., Cox, D. R. (1964). An analysis of transformations. Journal of the Royal Statistical Society: Series B (Methodological), 26(2), 211-243.

Examples

#================================================================
# Completely randomized design
#================================================================
data("pomegranate")
with(pomegranate, transf(WL,f1=trat))

#================================================================
# Randomized block design
#================================================================
data(soybean)
with(soybean, transf(prod, f1=cult, block=bloc))

#================================================================
# Completely randomized design in double factorial
#================================================================
data(cloro)
with(cloro, transf(resp, f1=f1, f2=f2))

#================================================================
# Randomized block design in double factorial
#================================================================
data(cloro)
with(cloro, transf(resp, f1=f1, f2=f2, block=bloco))