Get information about the array object. More...

Functions
const array	as (dtype type) const
	Converts the array into another type. More...

array	T () const
	Get the transposed the array. More...

array	H () const
	Get the conjugate-transpose of the current array. More...

AFAPI af_err	af_copy_array (af_array *arr, const af_array in)
	Deep copy an array to another. More...

AFAPI af_err	af_get_data_ref_count (int *use_count, const af_array in)
	Get the use count of `af_array` More...

AFAPI af_err	af_write_array (af_array arr, const void *data, const size_t bytes, af_source src)
	Copy data from a C pointer (host/device) to an existing array. More...

AFAPI af_err	af_get_data_ptr (void *data, const af_array arr)
	Copy data from an af_array to a C pointer. More...

AFAPI af_err	af_release_array (af_array arr)
	Reduce the reference count of the af_array. More...

AFAPI af_err	af_retain_array (af_array *out, const af_array in)
	Increments an af_array reference count. More...

AFAPI af_err	af_eval (af_array in)
	Evaluate any expressions in the Array. More...

AFAPI af_err	af_get_elements (dim_t *elems, const af_array arr)
	Gets the number of elements in an array. More...

AFAPI af_err	af_get_type (af_dtype *type, const af_array arr)
	Gets the type of an array. More...

AFAPI af_err	af_get_dims (dim_t d0, dim_t d1, dim_t d2, dim_t d3, const af_array arr)
	Gets the dimseions of an array. More...

AFAPI af_err	af_get_numdims (unsigned *result, const af_array arr)
	Gets the number of dimensions of an array. More...

AFAPI af_err	af_is_empty (bool *result, const af_array arr)
	Check if an array is empty. More...

AFAPI af_err	af_is_scalar (bool *result, const af_array arr)
	Check if an array is scalar, ie. More...

AFAPI af_err	af_is_row (bool *result, const af_array arr)
	Check if an array is row vector. More...

AFAPI af_err	af_is_column (bool *result, const af_array arr)
	Check if an array is a column vector. More...

AFAPI af_err	af_is_vector (bool *result, const af_array arr)
	Check if an array is a vector. More...

AFAPI af_err	af_is_complex (bool *result, const af_array arr)
	Check if an array is complex type. More...

AFAPI af_err	af_is_real (bool *result, const af_array arr)
	Check if an array is real type. More...

AFAPI af_err	af_is_double (bool *result, const af_array arr)
	Check if an array is double precision type. More...

AFAPI af_err	af_is_single (bool *result, const af_array arr)
	Check if an array is single precision type. More...

AFAPI af_err	af_is_realfloating (bool *result, const af_array arr)
	Check if an array is real floating point type. More...

AFAPI af_err	af_is_floating (bool *result, const af_array arr)
	Check if an array is floating precision type. More...

AFAPI af_err	af_is_integer (bool *result, const af_array arr)
	Check if an array is integer type. More...

AFAPI af_err	af_is_bool (bool *result, const af_array arr)
	Check if an array is bool type. More...

array &	eval (array &a)
	Evaluate an expression (nonblocking). More...

void	eval (array &a, array &b)

void	eval (array &a, array &b, array &c)

void	eval (array &a, array &b, array &c, array &d)

void	eval (array &a, array &b, array &c, array &d, array &e)

void	eval (array &a, array &b, array &c, array &d, array &e, array &f)

af_array	get ()
	get the af_array handle More...

af_array	get () const
	get the af_array handle More...

dim_t	elements () const
	get the number of elements in array More...

template<typename T >
T *	host () const
	Copy array data to host and return host pointer. More...

void	host (void *ptr) const
	Copy array data to existing host pointer. More...

template<typename T >
void	write (const T *ptr, const size_t bytes, af::source src=afHost)
	Perform deep copy from host/device pointer to an existing array. More...

dtype	type () const
	Get array data type. More...

dim4	dims () const
	Get dimensions of the array. More...

dim_t	dims (unsigned dim) const
	Get dimensions of the array. More...

unsigned	numdims () const
	Get the number of dimensions of the array. More...

size_t	bytes () const
	Get the size of the array in bytes. More...

array	copy () const
	Perform deep copy of the array. More...

bool	isempty () const
	Returns true of the array is empty. More...

bool	isscalar () const
	Returns true of the array contains only one value. More...

bool	isvector () const
	Returns true if only one of the array dimensions has more than one element. More...

bool	isrow () const
	Returns true if only the second dimension has more than one element. More...

bool	iscolumn () const
	Returns true if only the first dimension has more than one element. More...

bool	iscomplex () const
	Returns true if the array type is c32 or c64. More...

bool	isreal () const
	Returns true if the array type is neither c32 nor c64. More...

bool	isdouble () const
	Returns true if the array type is f64 or c64. More...

bool	issingle () const
	Returns true if the array type is neither f64 nor c64. More...

bool	isrealfloating () const
	Returns true if the array type is f32 or f64. More...

bool	isfloating () const
	Returns true if the array type is f32, f64, c32 or c64. More...

bool	isinteger () const
	Returns true if the array type is u8, b8, s32 u32, s64, u64, s16, u16. More...

bool	isbool () const
	Returns true if the array type is b8. More...

void	eval () const
	Evaluate any JIT expressions to generate data for the array. More...

template<typename T >
T	scalar () const
	Get the first element of the array as a scalar. More...

Detailed Description

Get information about the array object.

Function Documentation

AFAPI af_err af_copy_array	(	af_array *	arr,
		const af_array	in
	)

Deep copy an array to another.

AFAPI af_err af_eval ( af_array in )

Evaluate any expressions in the Array.

AFAPI af_err af_get_data_ptr	(	void *	data,
		const af_array	arr
	)

Copy data from an af_array to a C pointer.

Needs to used in conjunction with the two functions above

AFAPI af_err af_get_data_ref_count	(	int *	use_count,
		const af_array	in
	)

Get the use count of af_array

AFAPI af_err af_get_dims	(	dim_t *	d0,
		dim_t *	d1,
		dim_t *	d2,
		dim_t *	d3,
		const af_array	arr
	)

Gets the dimseions of an array.

Parameters

[out]	d0	is the output that contains the size of first dimension of `arr`
[out]	d1	is the output that contains the size of second dimension of `arr`
[out]	d2	is the output that contains the size of third dimension of `arr`
[out]	d3	is the output that contains the size of fourth dimension of `arr`
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_get_elements	(	dim_t *	elems,
		const af_array	arr
	)

Gets the number of elements in an array.

Parameters

[out]	elems	is the output that contains number of elements of `arr`
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_get_numdims	(	unsigned *	result,
		const af_array	arr
	)

Gets the number of dimensions of an array.

Parameters

[out]	result	is the output that contains the number of dims of `arr`
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_get_type	(	af_dtype *	type,
		const af_array	arr
	)

Gets the type of an array.

Parameters

[out]	type	is the output that contains the type of `arr`
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_bool	(	bool *	result,
		const af_array	arr
	)

Check if an array is bool type.

Parameters

[out]	result	is true if arr is of b8 type, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_column	(	bool *	result,
		const af_array	arr
	)

Check if an array is a column vector.

Parameters

[out]	result	is true if arr has dims [x 1 1 1], false otherwise
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_complex	(	bool *	result,
		const af_array	arr
	)

Check if an array is complex type.

Parameters

[out]	result	is true if arr is of type c32 or c64, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_double	(	bool *	result,
		const af_array	arr
	)

Check if an array is double precision type.

Parameters

[out]	result	is true if arr is of type f64 or c64, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_empty	(	bool *	result,
		const af_array	arr
	)

Check if an array is empty.

Parameters

[out]	result	is true if elements of arr is 0, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_floating	(	bool *	result,
		const af_array	arr
	)

Check if an array is floating precision type.

This is a combination of af_is_realfloating and af_is_complex

Parameters

[out]	result	is true if arr is of type f32, f64, c32 or c64, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_integer	(	bool *	result,
		const af_array	arr
	)

Check if an array is integer type.

Parameters

[out]	result	is true if arr is of integer types, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_real	(	bool *	result,
		const af_array	arr
	)

Check if an array is real type.

This is mutually exclusive to af_is_complex

Parameters

[out]	result	is true if arr is NOT of type c32 or c64, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_realfloating	(	bool *	result,
		const af_array	arr
	)

Check if an array is real floating point type.

Parameters

[out]	result	is true if arr is of type f32 or f64, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_row	(	bool *	result,
		const af_array	arr
	)

Check if an array is row vector.

Parameters

[out]	result	is true if arr has dims [1 x 1 1], false otherwise
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_scalar	(	bool *	result,
		const af_array	arr
	)

Check if an array is scalar, ie.

single element.

Parameters

[out]	result	is true if elements of arr is 1, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_single	(	bool *	result,
		const af_array	arr
	)

Check if an array is single precision type.

Parameters

[out]	result	is true if arr is of type f32 or c32, otherwise false
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_is_vector	(	bool *	result,
		const af_array	arr
	)

Check if an array is a vector.

A vector is any array that has exactly 1 dimension not equal to 1.

Parameters

[out]	result	is true if arr is a vector, false otherwise
[in]	arr	is the input array

Returns: error codes

AFAPI af_err af_release_array ( af_array arr )

Reduce the reference count of the af_array.

AFAPI af_err af_retain_array	(	af_array *	out,
		const af_array	in
	)

Increments an af_array reference count.

AFAPI af_err af_write_array	(	af_array	arr,
		const void *	data,
		const size_t	bytes,
		af_source	src
	)

Copy data from a C pointer (host/device) to an existing array.

const array as ( dtype type ) const

Converts the array into another type.

Parameters

[in] type is the desired type(f32, s64, etc.)

Returns: an array with the type specified by type

Examples:: graphics/conway.cpp, graphics/conway_pretty.cpp, graphics/gravity_sim.cpp, graphics/histogram.cpp, image_processing/brain_segmentation.cpp, machine_learning/deep_belief_net.cpp, and machine_learning/rbm.cpp.

size_t bytes ( ) const

Get the size of the array in bytes.

array copy ( ) const

Perform deep copy of the array.

Examples:: image_processing/adaptive_thresholding.cpp, image_processing/binary_thresholding.cpp, image_processing/filters.cpp, image_processing/pyramids.cpp, lin_algebra/cholesky.cpp, lin_algebra/lu.cpp, and lin_algebra/qr.cpp.

dim4 dims ( ) const

Get dimensions of the array.

Examples:: computer_vision/harris.cpp, computer_vision/matching.cpp, financial/black_scholes_options.cpp, financial/heston_model.cpp, getting_started/vectorize.cpp, graphics/fractal.cpp, graphics/gravity_sim.cpp, graphics/plot2d.cpp, graphics/surface.cpp, image_processing/adaptive_thresholding.cpp, image_processing/binary_thresholding.cpp, image_processing/brain_segmentation.cpp, image_processing/edge.cpp, image_processing/filters.cpp, image_processing/image_editing.cpp, image_processing/morphing.cpp, image_processing/optical_flow.cpp, image_processing/pyramids.cpp, machine_learning/bagging.cpp, machine_learning/deep_belief_net.cpp, machine_learning/kmeans.cpp, machine_learning/knn.cpp, machine_learning/logistic_regression.cpp, machine_learning/naive_bayes.cpp, machine_learning/neural_network.cpp, machine_learning/perceptron.cpp, machine_learning/rbm.cpp, and machine_learning/softmax_regression.cpp.

dim_t dims ( unsigned dim ) const

Get dimensions of the array.

dim_t elements ( ) const

get the number of elements in array

Examples:: image_processing/binary_thresholding.cpp, image_processing/filters.cpp, machine_learning/bagging.cpp, machine_learning/deep_belief_net.cpp, machine_learning/knn.cpp, machine_learning/logistic_regression.cpp, machine_learning/naive_bayes.cpp, machine_learning/neural_network.cpp, machine_learning/perceptron.cpp, machine_learning/rbm.cpp, and machine_learning/softmax_regression.cpp.

void eval ( ) const

Evaluate any JIT expressions to generate data for the array.

Examples:: benchmarks/blas.cpp, benchmarks/fft.cpp, graphics/fractal.cpp, machine_learning/bagging.cpp, machine_learning/knn.cpp, machine_learning/logistic_regression.cpp, machine_learning/naive_bayes.cpp, machine_learning/perceptron.cpp, and machine_learning/softmax_regression.cpp.

array& af::eval ( array & a )

inline

Evaluate an expression (nonblocking).

Examples:: financial/black_scholes_options.cpp, and pde/swe.cpp.

void af::eval	(	array &	a,
		array &	b
	)

inline

void af::eval	(	array &	a,
		array &	b,
		array &	c
	)

inline

void af::eval	(	array &	a,
		array &	b,
		array &	c,
		array &	d
	)

inline

void af::eval	(	array &	a,
		array &	b,
		array &	c,
		array &	d,
		array &	e
	)

inline

void af::eval	(	array &	a,
		array &	b,
		array &	c,
		array &	d,
		array &	e,
		array &	f
	)

inline

af_array get ( )

get the af_array handle

af_array get ( ) const

get the af_array handle

array H ( ) const

Get the conjugate-transpose of the current array.

Returns: conjugate-transpose matrix

T* host ( ) const

Copy array data to host and return host pointer.

Examples:: computer_vision/fast.cpp, computer_vision/harris.cpp, computer_vision/susan.cpp, and image_processing/binary_thresholding.cpp.

void host ( void * ptr ) const

Copy array data to existing host pointer.

bool isbool ( ) const

Returns true if the array type is b8.

bool iscolumn ( ) const

Returns true if only the first dimension has more than one element.

bool iscomplex ( ) const

Returns true if the array type is c32 or c64.

bool isdouble ( ) const

Returns true if the array type is f64 or c64.

bool isempty ( ) const

Returns true of the array is empty.

bool isfloating ( ) const

Returns true if the array type is f32, f64, c32 or c64.

bool isinteger ( ) const

Returns true if the array type is u8, b8, s32 u32, s64, u64, s16, u16.

bool isreal ( ) const

inline

Returns true if the array type is neither c32 nor c64.

bool isrealfloating ( ) const

Returns true if the array type is f32 or f64.

bool isrow ( ) const

Returns true if only the second dimension has more than one element.

bool isscalar ( ) const

Returns true of the array contains only one value.

bool issingle ( ) const

Returns true if the array type is neither f64 nor c64.

bool isvector ( ) const

Returns true if only one of the array dimensions has more than one element.

unsigned numdims ( ) const

Get the number of dimensions of the array.

T scalar ( ) const

Get the first element of the array as a scalar.

Note: This is recommended for use while debugging. Calling this method constantly reduces performance.

Examples:: image_processing/binary_thresholding.cpp, and machine_learning/kmeans.cpp.

array T ( ) const

Get the transposed the array.

Returns: Transposed matrix

Examples:: getting_started/integer.cpp, getting_started/vectorize.cpp, image_processing/filters.cpp, machine_learning/bagging.cpp, machine_learning/deep_belief_net.cpp, machine_learning/knn.cpp, machine_learning/logistic_regression.cpp, machine_learning/naive_bayes.cpp, machine_learning/neural_network.cpp, machine_learning/perceptron.cpp, machine_learning/rbm.cpp, and machine_learning/softmax_regression.cpp.

dtype type ( ) const

Get array data type.

Examples:: image_processing/brain_segmentation.cpp, and image_processing/morphing.cpp.

void write	(	const T *	ptr,
		const size_t	bytes,
		af::source	src = `afHost`
	)

Perform deep copy from host/device pointer to an existing array.

Functions

Detailed Description

Function Documentation