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some

Sample a Few Elements of an Object

Description

Randomly select a few elements of an object, typically a data frame, matrix, vector, or list. If the object is a data frame or a matrix, then rows are sampled.

Usage

some(x, ...)

## S3 method for class 'data.frame'
some(x, n=10, cols=NULL, ...)

## S3 method for class 'matrix'
some(x, n=10, cols=NULL, ...)

## Default S3 method:
some(x, n=10, ...)

Arguments

`x`	the object to be sampled.
`n`	number of elements to sample.
`cols`	if `NULL`, use all columns, if a vector of column names or numbers, use only the columns indicated
`...`	arguments passed down.

Value

Sampled elements or rows.

Note

These functions are adapted from head and tail in the utils package.

Author(s)

John Fox jfox@mcmaster.ca

References

Fox, J. and Weisberg, S. (2019) An R Companion to Applied Regression, Third Edition, Sage.

Examples

some(Duncan)
some(Duncan, cols=names(Duncan)[1:3])

car

Companion to Applied Regression

v3.0-10

GPL (>= 2)

Authors

John Fox [aut, cre], Sanford Weisberg [aut], Brad Price [aut], Daniel Adler [ctb], Douglas Bates [ctb], Gabriel Baud-Bovy [ctb], Ben Bolker [ctb], Steve Ellison [ctb], David Firth [ctb], Michael Friendly [ctb], Gregor Gorjanc [ctb], Spencer Graves [ctb], Richard Heiberger [ctb], Pavel Krivitsky [ctb], Rafael Laboissiere [ctb], Martin Maechler [ctb], Georges Monette [ctb], Duncan Murdoch [ctb], Henric Nilsson [ctb], Derek Ogle [ctb], Brian Ripley [ctb], William Venables [ctb], Steve Walker [ctb], David Winsemius [ctb], Achim Zeileis [ctb], R-Core [ctb]

Initial release

2020-09-23