xf: Methods that apply a function across a levels of one or more...

In giguerch/CUFF: Charles's Utility Function using Formula

Methods that apply a function across a levels of one or more factors

Description

Methods that apply a function across a levels of one or more factors. It works like aggregate but returns a table instead. It also has a useNA options that adds NA as a level before applying the function.

Usage

xf(formula, data, FUN, ..., subset, na.action = na.omit, useNA = FALSE, addmargins = TRUE)

Arguments

formula	Formula defining the variables. On the left is the variable we are applying the function to, on the right, variables defining levels of the tables
data	Data.frame containing the variables
FUN	The function to apply to each subset of data
...	extra parameters to FUN
subset	Vectors defining a subset of data.frame (see help(aggregate)).
na.action	Action functions to deal with NA in data file
useNA	Make NA a level of the factors (if any)
addmargins	Add function applied to the margins of each category

Value

xf returns an object "xf" that behaves like a table with all associated methods.

Author(s)

Charles-Édouard Giguère

Examples

res <- xf(Sepal.Length~Species,iris,mean)
barplot(res)

giguerch/CUFF documentation built on March 27, 2024, 5:36 p.m.