isplit: Split Iterator

In iterors: Fast, Compact Iterators and Tools

Split Iterator

Description

Returns an iterator that divides the data in the vector x into the groups defined by f.

Usage

isplit(x, f, drop = FALSE, ...)

Arguments

x	vector or data frame of values to be split into groups.
f	a factor or list of factors used to categorize x.
drop	logical indicating if levels that do not occur should be dropped.
...	current ignored.

Details

Originally from the iterators package.

Value

The split iterator.

See Also

split

Examples

x <- rnorm(200)
f <- factor(sample(1:10, length(x), replace = TRUE))

it <- isplit(x, f)
expected <- split(x, f)

for (i in expected) {
    actual <- nextOr(it, break)
    stopifnot(actual$value == i)
}

iterors documentation built on May 31, 2023, 5:36 p.m.