Column and row-wise range of values of a matrix {Rfast}

Column and row-wise range of values of a matrix.

Description

Column and row-wise range of values of a matrix.

Usage

colrange(x, cont = TRUE, parallel = FALSE,cores = 0)
rowrange(x, cont = TRUE)

Arguments

x

A numerical matrix or data.frame with data.

parallel

Execute algorithm in parallel for data.frame.

cont

If the data are continuous, leave this TRUE and it will return the range of values for each variable (column). If the data are integers, categorical, or if you want to find out the number of unique numbers in each column set this to FALSE.

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.

Value

A vector with the relevant values.

Author(s)

Manos Papadakis

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

See Also

colMins, colMaxs, rowMins, rowMaxs, nth, colMedians, colVars, colSort, rowSort

Examples

x <- matrix( rnorm(100 * 100), ncol = 100 )

a1 <- colrange(x) 
a2 <- apply(x, 2, function(x) diff( range(x)) ) 
all.equal(a1, a2)

a1 <- rowrange(x) 
a2 <- apply(x, 1, function(x) diff( range(x)) ) 
all.equal(a1, a2)

x<-a1<-a2<-NULL