px {equate}R Documentation

Percentile Rank Function

Description

This function returns the percentile ranks for each score point in a frequency distribution.

Usage

px(x)

Arguments

x two-column matrix of class “freqtab”, where column 1 specifies the score scale and column 2 the frequencies for each score point

Value

Returns a vector of percentile ranks

Author(s)

Anthony Albano tony.d.albano@gmail.com

See Also

fx

Examples

x <- freqtab(ACTmath[,2],0:40)
px(x)

[Package equate version 0.1-1 Index]