Class NDIterUtils

Namespace

NumSharp.Backends.Iteration

Assembly

NumSharp.dll

Helper utilities for NDIter op_axes encoding/decoding.

public static class NDIterUtils

Inheritance

object

NDIterUtils

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Methods

GetOpAxis(int, out bool)

Decodes an op_axes entry. Matches NumPy's npyiter_get_op_axis (nditer_constr.c:1439).

public static int GetOpAxis(int axis, out bool isReduction)

Parameters

axis int

The raw value from op_axes[iop][idim].

isReduction bool

True if the entry was flagged as a reduction axis.

Returns

int

The axis index (with reduction flag stripped if present).

ReductionAxis(int)

Encodes an op_axes entry as an explicit reduction axis. Matches NumPy's NPY_ITER_REDUCTION_AXIS macro (common.h:347).

Use in the opAxes parameter of AdvancedNew(int, NDArray[], NDIterGlobalFlags, NPY_ORDER, NPY_CASTING, NDIterPerOpFlags[], NPTypeCode[]?, int, int[][]?, long[]?, long) to mark an axis as a reduction target (must have length 1 on the operand, and the operand must be READWRITE with REDUCE_OK set).

public static int ReductionAxis(int axis)

Parameters

axis int

The axis index (may be -1 to mean broadcast+reduce).

Returns

int

The encoded value for op_axes[iop][idim].