freqTable: Generate a Frequency Table

In TalhoukLab/biostatUtil: Utility Functions Used in Biostatistics Projects

Generate a Frequency Table

Description

A frequency table emulating the SPSS FREQ output is generated.

Usage

freqTable(
  x,
  levels = sort(unique(as.character(x))),
  missing = NULL,
  description = NULL,
  round = 1,
  plot = FALSE
)

Arguments

x	vector of values to show frequencies for
levels	(optional) vector for order of levels in x
missing	vector of levels for which we consider missing and don't count in the valid percentage
description	(optional) description for each level of x. Must be same length and order as levels
round	number of digits to round percentages to
plot	logical; if TRUE, a barplot is produced.

Value

A data frame with the following columns

Class	Tells you which scores are valid and which are missing. Not shown if there are no missing values.
Score	Different levels
Frequency	Count for each score
Percent	Percent of Frequency out of the grand total
Valid Percent	Percent of Frequency out of the Valid scores. Not applicable if there are no missing values.
Cumulative Percent	Accumulated Percent of Frequency out of the Valid Scores
Description	If description is given, a description for each level

Author(s)

Derek Chiu

See Also

freq()

Examples

# Create vector of randomly reordered alphabet with various frequencies
# for each letter
set.seed(123)
n <- sample(10, length(letters), replace = TRUE)
x <- sample(rep.int(letters, times = n))
freqTable(x, plot = TRUE)

# Treat vowels as missing
freqTable(x, missing = c("a", "e", "i", "o", "u"), round = 2)

TalhoukLab/biostatUtil documentation built on April 14, 2025, 4:15 a.m.