strFrqTable: Format Frequency Tsables

In Cogitos/predata: Predata load data and explore them

Description

Simple function to compute the frequency table of a given factor according to some variables (optional). Return a data frame with the frequencies concatenate together. It is of your responsability to identify (or rename) the levels of the target variable.

Usage

strFrqTable(dt, target, vars = NULL, sep_symbol = "/")

Arguments

dt	A data frame to process.
target	A string of the column name to target (i.e. the one used to compute the frequency table).
vars	Optional, a string or vector of strings of the column names of the variables to consider when computing the frequency table.
sep_symbol	Optional, the symbol to use in the concatenation of the frequencies. Default to "/".

Value

Return a data frame with the frequencies concatenated in a string separated by the sep_symbol argument (default to '/').

Author(s)

Guillaume T. Vallet [e-mail], University of Montreal (Canada)

Examples

# Create data frame faking a group of young and elderly adults.
data = rbind(
     data.frame(subject=1:10,
         age=round(rnorm(10, mean=23, sd=1.5), 0),
         education=round(rnorm(10, mean=15, sd=2.1), 0),
         sex=sample(1:2, size=10, replace=T, prob=c(.6,.4)),
         group='young'),
     data.frame(subject=11:20,
         age=round(rnorm(10, mean=71, sd=2), 0),
         education=round(rnorm(10, mean=14, sd=1.9), 0),
         sex=sample(1:2, size=10, replace=T, prob=c(.4,.6)),
         group='elderly'))
# Compute the frequency table for the gender variable.
strFrqTable(data, 'sex', sep_symbol="-")
# Compute the frequency table for the gender variable by group.
strFrqTable(data, target='sex', vars='group')

Cogitos/predata documentation built on May 6, 2019, 12:21 p.m.