Gradient or grid construction

Functions
array	diff1 (const array &in, int dim=-1)
	difference between elements along a dimension
array	diff2 (const array &in, int dim=-1)
	difference between every other element along a dimension
void	grad (array &dx, array &dy, const array &in)
	Gradient of a matrix (central differencing).
void	grid (array &x, array &y, const array &v1, const array &v2)
	Create a regular mesh grid.

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Function Documentation

array af::diff1	(	const array &	in,
		int	dim = -1
	)

difference between elements along a dimension

Parameters:

[in]	in
[in]	dim	dimension along which to operate (-1 indicates first nonsingleton dimension)

Returns:

difference between neighboring elements

Examples:

examples/fdtd/fdtd.cpp.

array af::diff2	(	const array &	in,
		int	dim = -1
	)

difference between every other element along a dimension

Parameters:

[in]	in
[in]	dim	dimension along which to operate (-1 indicates first nonsingleton dimension)

Returns:

second order difference between elements

void af::grad	(	array &	dx,
		array &	dy,
		const array &	in
	)

Gradient of a matrix (central differencing).

Parameters:

[in]	in	2D
[out]	dx	gradient along the first dimension
[out]	dy	gradient along the second dimension

void af::grid	(	array &	x,
		array &	y,
		const array &	v1,
		const array &	v2
	)

Create a regular mesh grid.

Transform the domain specified by vectors v1 and v2 into arrays x and y. The rows of array X are copies of vector v1, columns of output Y are copies of vector v2.

Parameters:

[in]	v1	indicates row to be repeated
[in]	v2	indicates the column to be repeated
[out]	x	matrix with rows as copies of v1
[out]	y	matrix with columns as copies of v2

Examples:

examples/swe/swe.cpp.