sample-methods: Take a Sample from a Data Frame-like Object

In memisc: Tools for Management of Survey Data and the Presentation of Analysis Results

Description

The methods below are convenience short-cuts to take samples from data frames and data sets. They result in a data frame or data set, respectively, the rows of which are a sample of the complete data frame/data set.

Usage

## S4 method for signature 'data.frame'
sample(x, size, replace = FALSE, prob = NULL)
## S4 method for signature 'data.set'
sample(x, size, replace = FALSE, prob = NULL)
## S4 method for signature 'importer'
sample(x, size, replace = FALSE, prob = NULL)

Arguments

x	a data frame or data set.
size	an (optional) numerical value, the sample size, defaults to the total number of rows of x.
replace	a logical value, determines whether sampling takes place with or without replacement.
prob	a vector of sampling probabities or NULL.

Value

A data frame or data set.

Examples

for(.i in 1:4)
  print(sample(iris,5))

memisc documentation built on May 2, 2019, 5:45 p.m.