count

Count the number of non-zero elements in the input. More...

Functions
AFAPI array	count (const array &in, const int dim=-1)
	C++ Interface for counting non-zero values in an array. More...
template<typename T >
T	count (const array &in)
	C++ Interface for counting total number of non-zero values in an array. More...
AFAPI af_err	af_count (af_array *out, const af_array in, const int dim)
	C Interface for counting non-zero values in an array. More...
AFAPI af_err	af_count_all (double *real, double *imag, const af_array in)
	C Interface for counting total number of non-zero values in an array. More...

Detailed Description

Count the number of non-zero elements in the input.

Return type is u32 for all input types

This function performs the operation across all batches present in the input simultaneously.

Function Documentation

AFAPI af_err af_count	(	af_array *	out,
		const af_array	in,
		const int	dim
	)

C Interface for counting non-zero values in an array.

Parameters

[out]	out	will contain the number of non-zero values in in along dim
[in]	in	is the input array
[in]	dim	The dimension along which the non-zero values are counted

Returns

AF_SUCCESS if the execution completes properly

AFAPI af_err af_count_all	(	double *	real,
		double *	imag,
		const af_array	in
	)

C Interface for counting total number of non-zero values in an array.

Parameters

[out]	real	will contain the number of non-zero values in in.
[out]	imag	is always set to 0.
[in]	in	is the input array

Returns

AF_SUCCESS if the execution completes properly

Note

imag is always set to 0.

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

C++ Interface for counting non-zero values in an array.

Parameters

[in]	in	is the input array
[in]	dim	The dimension along which the the number of non-zero values are counted

Returns

the number of non-zero values along dimension dim

Note

dim is -1 by default. -1 denotes the first non-singleton dimension.

NaN values are treated as non zero.

Examples:

benchmarks/pi.cpp.

T af::count

(

const array &

in

)

C++ Interface for counting total number of non-zero values in an array.

Parameters

[in]

in

is the input array

Returns

the number of non-zero values in in

Note

NaN values are treated as non zero