Median: Column and row-wise medians of a matrix or median of a...

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

Column and row-wise medians of a matrix or median of a vector.

Description

Column and row-wise medians of a matrix or median of a vector.

Usage

colMedians(x,na.rm = FALSE, parallel = FALSE, cores = 0)
rowMedians(x,na.rm = FALSE, parallel = FALSE, cores = 0)
Median(x,na.rm=FALSE)
med(x,na.rm=FALSE)

Arguments

x	A vector, matrix or data.frame with the data.
parallel	Do you want to do it in parallel in C++? TRUE or FALSE.
na.rm	TRUE or FAlSE for remove NAs if exists.
cores	Number of cores to use for parallelism. Valid only when argument parallel is set to TRUE. Default value is 0 and it means the maximum supported cores.

Details

The functions is written in C++ in order to be as fast as possible.

Value

A vector with the column medians.

Author(s)

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

See Also

Median, colVars, colMeans (buit-in R function)

Examples

x <- matrix( rnorm(100 * 100), ncol = 100 )
a <- apply(x, 2, median) 
b1 <- colMedians(x) 
all.equal(as.vector(a), b1)

x<-a<-b1<-NULL

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