permute (version 0.9-7)

nobs-methods: Number of observations in a given object

Description

nobs is a generic function to return the number of observations from a model. shuffle provides a few methods for other types of data object in R.

Usage

# S3 method for numeric
nobs(object, …)
# S3 method for integer
nobs(object, …)
# S3 method for matrix
nobs(object, …)
# S3 method for data.frame
nobs(object, …)
# S3 method for character
nobs(object, …)
# S3 method for factor
nobs(object, …)

Arguments

object

a data frame or matrix, or a numeric, integer, character, or factor vector.

…

arguments to other methods.

Value

The (numeric) number of observations in object.

Details

Function nobs is a simple generic function to return the number of observations in a range of R model objects. Methods are provided to work with a variety of R objects.

Examples

# NOT RUN {
set.seed(1)
## numeric vector
len <- sample(1:10, 1)
v <- as.numeric(sample(1:100, len))
len
obs <- nobs(v)
isTRUE(all.equal(len, obs))

## integer
len <- sample(1L:10L, 1)
obs <- nobs(len)
isTRUE(all.equal(len, obs))

# }