ichunk: Create a chunking iterator

In itertools: Iterator Tools

Description

Create an iterator that issues lists of values from the underlying iterable. This is useful for manually “chunking” values from an iterable.

Usage

ichunk(iterable, chunkSize, mode='list')

Arguments

iterable	Iterable to iterate over.
chunkSize	Maximum number of values from iterable to return in each value issued by the resulting iterator.
mode	Mode of the objects returned by the iterator.

See Also

isplitVector

Examples

# Split the vector 1:10 into "chunks" with a maximum length of three
it <- ihasNext(ichunk(1:10, 3))
while (hasNext(it)) {
  print(unlist(nextElem(it)))
}

# Same as previous, but return integer vectors rather than lists
it <- ihasNext(ichunk(1:10, 3, mode='integer'))
while (hasNext(it)) {
  print(nextElem(it))
}

Example output

Loading required package: iterators
[1] 1 2 3
[1] 4 5 6
[1] 7 8 9
[1] 10
[1] 1 2 3
[1] 4 5 6
[1] 7 8 9
[1] 10

itertools documentation built on May 2, 2019, 2:26 p.m.