Number of observations in a given object

stats::nobs() is a generic function that returns the number of observations from a model. permute provides methods for several other types of R object.

Usage

# S3 method for class 'numeric'
nobs(object, ...)

# S3 method for class 'integer'
nobs(object, ...)

# S3 method for class 'matrix'
nobs(object, ...)

# S3 method for class 'data.frame'
nobs(object, ...)

# S3 method for class 'character'
nobs(object, ...)

# S3 method for class 'factor'
nobs(object, ...)

Arguments

object

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

...

Arguments passed to other methods.

Value

The numeric number of observations in object.

Details

These methods return the number of observations in numeric, integer, character, or factor vectors, matrices, and data frames.

Author

Gavin Simpson

Examples

set.seed(1)
## numeric vector
len <- sample(1:10, 1)
v <- as.numeric(sample(1:100, len))
len
#> [1] 3
obs <- nobs(v)
isTRUE(all.equal(len, obs))
#> [1] TRUE

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