index

lookup values on array based on sequences More...

Functions
AFAPI array	lookup (const array &in, const array &idx, const int dim=-1)
	Lookup the values of input array based on index. More...
AFAPI void	copy (array &dst, const array &src, const index &idx0, const index &idx1=span, const index &idx2=span, const index &idx3=span)
	Copy the values of an input array based on index. More...
AFAPI af_err	af_index (af_array *out, const af_array in, const unsigned ndims, const af_seq *const index)
	Lookup the values of input array based on sequences. More...
AFAPI af_err	af_lookup (af_array *out, const af_array in, const af_array indices, const unsigned dim)
	Lookup the values of input array based on index. More...
AFAPI af_err	af_index_gen (af_array *out, const af_array in, const dim_t ndims, const af_index_t *indices)
	Indexing an array using af_seq, or af_array. More...

Detailed Description

lookup values on array based on sequences

Function Documentation

AFAPI af_err af_index	(	af_array *	out,
		const af_array	in,
		const unsigned	ndims,
		const af_seq *const	index
	)

Lookup the values of input array based on sequences.

Parameters

[out]	out	output array containing values indexed by the sequences
[in]	in	is the input array
[in]	ndims	is the number of sequences provided
[in]	index	is an array of sequences

AFAPI af_err af_index_gen	(	af_array *	out,
		const af_array	in,
		const dim_t	ndims,
		const af_index_t *	indices
	)

Indexing an array using af_seq, or af_array.

Generalized indexing function that accepts either af_array or af_seq along a dimension to index the input array and create the corresponding output array

Parameters

[out]	out	output array containing values at indexed by the sequences
[in]	in	is the input array
[in]	ndims	is the number of af_index_t provided
[in]	indices	is an array of af_index_t objects

AFAPI af_err af_lookup	(	af_array *	out,
		const af_array	in,
		const af_array	indices,
		const unsigned	dim
	)

Lookup the values of input array based on index.

Parameters

[out]	out	output array containing values at locations specified by index
[in]	in	is input lookup array
[in]	indices	is lookup indices
[in]	dim	specifies the dimension for indexing

AFAPI void af::copy	(	array &	dst,
		const array &	src,
		const index &	idx0,
		const index &	idx1 = span,
		const index &	idx2 = span,
		const index &	idx3 = span
	)

Copy the values of an input array based on index.

Parameters

[out]	dst	The destination array
[in]	src	The source array
[in]	idx0	The first index
[in]	idx1	The second index (defaults to af::span)
[in]	idx2	The third index (defaults to af::span)
[in]	idx3	The fourth index (defaults to af::span)

AFAPI array af::lookup	(	const array &	in,
		const array &	idx,
		const int	dim = -1
	)

Lookup the values of input array based on index.

Parameters

[in]	in	is input lookup array
[in]	idx	is lookup indices
[in]	dim	specifies the dimension for indexing

Returns

an array containing values at locations specified by index

Examples:

machine_learning/bagging.cpp, and machine_learning/naive_bayes.cpp.