Label Bins#

group label_bins

Enums

enum class inclusive#

Enum used to define whether or not bins include their boundary points.

Values:

enumerator YES#
enumerator NO#

Functions

std::unique_ptr<column> label_bins(column_view const &input, column_view const &left_edges, inclusive left_inclusive, column_view const &right_edges, inclusive right_inclusive, rmm::cuda_stream_view stream = cudf::get_default_stream(), rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref())#

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.

Throws:

  • 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.

  • stream – CUDA stream used for device memory operations and kernel launches

  • 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.

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