z: Flexible standardization of variables

In jasongraf1/JGmisc: Miscellaneous R functions.

Flexible standardization of variables

Description

Generic function that standardizes a vector, matrix or dataframe by user-defined parameters.

Usage

z.(x, center = NULL, factor = 1)

Arguments

x	a vector, matrix, or dataframe.
center	numeric. Value around which values in x will be centered? If NULL, the mean of x is used.
factor	numeric. A scale multiplier (see details).

Details

For each item in x, subtract value specified by center and divide by scaling factor. The scaling factor is the standard deviation of x times factor. The default is z-score standardization (center around mean and divide by 1 standard deviation).

Author(s)

Jason Grafmiller

References

Gelman, A. & J. Hill. 2007. Data Analysis Using Regression and Multilevel/Hierarchical Models. New York: Cambridge University Press.

See Also

scale, c.

Examples

x <- rnorm(50, mean = 10, sd = 5)
z.(x)
z.(x, factor = 2)
z.(x, center = 2, factor = 1.5)

jasongraf1/JGmisc documentation built on July 8, 2024, 6:50 a.m.