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columns

Get specific columns/rows fo a matrix

Description

Get specific columns/rows of a matrix.

Usage

columns(x,indices)
rows(x,indices)

Arguments

x

A matrix with data.

indices

An integer vector with the indices.

Value

A matrix with the specific columns/rows of argumment indices.

Author(s)

Manos Papadakis

R implementation and documentation: Manos Papadakis <papadakm95@gmail.com>.

See Also

Examples

x <- matrix(runif(100*100),100,100)
indices = sample(1:100,50)
all.equal(x[,indices],columns(x,indices))
all.equal(x[indices,],rows(x,indices))

x<-indices<-NULL
Rfast

A Collection of Efficient and Extremely Fast R Functions

v2.0.1
GPL (>= 2.0)
Authors
Manos Papadakis, Michail Tsagris, Marios Dimitriadis, Stefanos Fafalios, Ioannis Tsamardinos, Matteo Fasiolo, Giorgos Borboudakis, John Burkardt, Changliang Zou, Kleanthi Lakiotaki and Christina Chatzipantsiou.
Initial release
2020-09-13

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