Description

A ChunkedArray is a data structure managing a list of primitive Arrow Arrays logically as one large array. Chunked arrays may be grouped together in a Table.

Usage

Arguments

Factory

The ChunkedArray$create() factory method instantiates the object from various Arrays or R vectors. chunked_array() is an alias for it.

Methods

• $length(): Size in the number of elements this array contains

• $chunk(i): Extract an Array chunk by integer position

• $as_vector(): convert to an R vector

• $Slice(offset, length = NULL): Construct a zero-copy slice of the array with the indicated offset and length. If length is NULL, the slice goes until the end of the array.

• $Take(i): return a ChunkedArray with values at positions given by integers i. If i is an Arrow Array or ChunkedArray, it will be coerced to an R vector before taking.

• $Filter(i, keep_na = TRUE): return a ChunkedArray with values at positions where logical vector or Arrow boolean-type (Chunked)Array i is TRUE.

• $SortIndices(descending = FALSE): return an Array of integer positions that can be used to rearrange the ChunkedArray in ascending or descending order

• $cast(target_type, safe = TRUE, options = cast_options(safe)): Alter the data in the array to change its type.

• $null_count(): The number of null entries in the array

• $chunks(): return a list of Arrays

• $num_chunks(): integer number of chunks in the ChunkedArray

• $type(): logical type of data

• $View(type): Construct a zero-copy view of this ChunkedArray with the given type.

• $Validate(): Perform any validation checks to determine obvious inconsistencies within the array's internal data. This can be an expensive check, potentially O(length)

See Also

Array