Index or count nonzero elements

array	where (const array &input)
	indices where nonzero
void	where (array &row, array &column, const array &input)
	row and column indices of nonzero elements in input
unsigned	count (const array &input)
	count nonzero elements in input

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Function Documentation

array af::where

(

const array &

input

)

indices where nonzero

Parameters:

[in]

input

Returns:

[out] indices of nonzero elements

void af::where	(	array &	row,
		array &	column,
		const array &	input
	)

row and column indices of nonzero elements in input

Parameters:

[in]	input
[out]	row
[out]	column

unsigned af::count

(

const array &

input

)

count nonzero elements in input

Parameters:

[in]

input

Returns:

The number of nonzero elements in input

Examples:

examples/image/gfor_hist_demo.cpp, examples/misc/blas.cpp, and examples/pi/pi.cpp.