Bin Labeling

Files
file	label_bins.hpp
	APIs for labeling values by bin.

Enumerations
enum class	cudf::inclusive { YES , NO }
	Enum used to define whether or not bins include their boundary points.

Functions
std::unique_ptr< column >	cudf::label_bins (column_view const &input, column_view const &left_edges, inclusive left_inclusive, column_view const &right_edges, inclusive right_inclusive, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Labels elements based on membership in the specified bins. More...

Detailed Description

Function Documentation

label_bins()

std::unique_ptr<column> cudf::label_bins	(	column_view const &	input,
		column_view const &	left_edges,
		inclusive	left_inclusive,
		column_view const &	right_edges,
		inclusive	right_inclusive,
		rmm::mr::device_memory_resource *	mr = rmm::mr::get_current_device_resource()
	)

Labels elements based on membership in the specified bins.

A bin i is defined by left_edges[i], right_edges[i]. Whether the edges are inclusive or not is determined by left_inclusive and right_inclusive, respectively.

A value input[j] belongs to bin i if value[j] is contained in the range left_edges[i], right_edges[i] (with the specified inclusiveness) and label[j] == i. If input[j] does not belong to any bin, then label[j] is NULL.

Notes:

• If an empty set of edges is provided, all elements in input are labeled NULL.
• NULL elements in input belong to no bin and their corresponding label is NULL.
• NaN elements in input belong to no bin and their corresponding label is NULL.
• Bins must be provided in monotonically increasing order, otherwise behavior is undefined.
• If two or more bins overlap, behavior is undefined.

Exceptions

cudf::logic_error	if input.type() == left_edges.type() == right_edges.type() is violated.
cudf::logic_error	if left_edges.size() != right_edges.size()
cudf::logic_error	if left_edges.has_nulls() or right_edges.has_nulls()

Parameters

input	The input elements to label according to the specified bins.
left_edges	Values of the left edge of each bin.
left_inclusive	Whether or not the left edge is inclusive.
right_edges	Value of the right edge of each bin.
right_inclusive	Whether or not the right edge is inclusive.
mr	Device memory resource used to allocate the returned column's device.

Returns

The integer labels of the elements in input according to the specified bins.