peek {futile}R Documentation

Peeks inside a matrix or vector

Description

Peek is a simple utility to conveniently look at a portion of a matrix. This is similar to head and tail but provides a 2-dimensional slice instead of a complete row.

The a and z functions are conveniences for prepending and appending values to a vector. These are currently stubs but intended to support additional types later on.

Mid is similar to the median except it is unordered and operates on both 1 and 2 dimensional data. So rather than calculating the median per se, mid is retrieving the unordered mid point value within a sequence or tabular data.

Usage

peek(x, upper = 5, lower = 1)
a(x) <- value
z(x) <- value
mid(x)

Arguments

x Any object that supports subsetting
upper The upper bound in the subsetting
lower The lower bound in the subsetting
value A value to add to a vector

Value

Peek returns a subset of the original matrix, data.frame, etc.
The unordered mid point value in a data set.

Author(s)

Brian Lee Yung Rowe

See Also

median

Examples

  peek(matrix(c(1,3,4,2, 5,10,11,2, 3,42,8,22, 23,15,3,8), ncol=4), 2)

  x <- c(2,3,4)
  a(x) <- 1
  z(x) <- 5

  mid(c(1,3,4,2,10))
  median(c(1,3,4,2,10))

  mid(matrix(c(1,3,4,2,5,10), ncol=2))

[Package futile version 1.1.1 Index]