DescTools (version 0.99.19)

Rev: Reverse Elements of a Vector or the Rows/Columns of Matrices and Tables

Description

Rev provides a reversed version of its argument. It wraps the base function rev and provides an additional method for matrices and higher dimensional tables, such as to reverse the order of rows and columns.

Usage

Rev(x, ...)
"Rev"(x, margin, ...) 
"Rev"(x, margin, ...)

Arguments

x

a vector, a matrix or a higher dimensional table to be reversed.

margin

vector of dimensions which to be reversed (1 for rows, 2 for columns, etc.).

...

the dots are passed to the matrix, resp. table interface.

See Also

rev, order, sort, seq

Examples

tab <- matrix( c( 1, 11, 111,
                  2, 22, 222,
                  3, 33, 333), byrow=TRUE, nrow=3)

Rev(tab, margin=1)                  
Rev(tab, margin=2)                  

# reverse both dimensions
Rev(tab, margin=c(1,2))