Number of observations in a given object
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.
## 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, ...)
object |
a data frame or matrix, or a numeric, integer, character, or factor vector. |
... |
arguments to other methods. |
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.
The (numeric) number of observations in object.
Gavin Simpson
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))
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