group: Some summary statistics of a vector for each level of a...

In Rfast: A Collection of Efficient and Extremely Fast R Functions

Some summary statistics of a vector for each level of a grouping variable.

Description

Some summary statistics of a vector for each level of a grouping variable.

Usage

group(x,ina,method="sum",ina.min=NULL,ina.max = NULL,
	ina.length.unique=NULL,mad.method="median")
group.sum(x, ina,ina.max = NULL,ina.min = NULL)

Arguments

x	A numerical vector with data.
ina	A numerical vector with numbers. Note that zero and negative values are not allowed as this can cause R to run forever or crash.
ina.length.unique	Length of the unique numerical values of ina argument.
method	A character vector with values "sum", "var", "all", "any", "mad", "mean", "med", "min", "max", "min.max".
ina.max	Maximum number for vector ina.
ina.min	Minimum number for vector ina.
mad.method	A character vector with values "median", for median absolute deviation or "mean", for mean absolute deviation. This works only with method="mad".

Details

This command works only for vectors. Median absolute deviation, mean, median, minimum, maximum are some of the options offered.

Value

A vector with the variance, or standard deviation, or mean, or minimum, or maximum, or median, or minimum-maximum of x for each distinct value of ina.

Author(s)

Manos Papadakis and Michail Tsagris

R implementation and documentation: Manos Papadakis <[e-mail]> and Michail Tsagris <[e-mail]>.

See Also

colmeans, colVars, colMedians

Examples

x <- rgamma(100,1, 4)
ina <- sample(1:5, 100, TRUE)
res<-group(x, ina,method="var")

Rfast documentation built on Nov. 9, 2023, 5:06 p.m.