symbox

a vector of selected powers to which <code>x</code> is to be raised. 
        A power of 0 is taken to mean $log(x)$. Negative
        powers are taken to mean $-x^p$, to preserve the order of the data.
        For meaningful comparison of powers,  1 s

powers

a constant to be added to <code>x</code>; after adding the start, all data
        values must be positive.

start

<code>symbox</code> first transforms <code>x</code> to each of a series
    of selected powers, with each transformation standardized to mean 0 and
    standard deviation 1. The results are then displayed side-by-side in boxplots, permiting
    a visual assessment of which power makes the distribution reasonably symmetric.

hplot

This package accompanies J. Fox, An R and S-PLUS Companion
        to Applied Regression, Sage, 2002. The package contains mostly
        functions for applied regression, linear models, and
        generalized linear models, with an emphasis on regression
        diagnostics, particularly graphical diagnostic methods. There
        are also some utility functions. With some exceptions, I have
        tried not to duplicate capabilities in the basic distribution
        of R, nor in widely used packages. Where relevant, the
        functions in car are consistent with na.action = na.omit or
        na.exclude.

symbox: Boxplots for transformations to symmetry

Description

Usage

Arguments

Value

References

See Also

Examples