Pad the edges of a list with 0s:

Pad the edges of a matrix:

Specify different padding on each side:

Pad with any expression:

Pad according to a named rule:

Pad by 5 elements on each row and 1 element on each column:

Pad only on the right:

Remove elements from each edge of an array:

Pad with extra rows:

Pad with extra columns:

Specify different padding for each edge:

Pad only the first level of an array:

Pad by repeating periodically:

Pad with the reversal of the list:

Pad with the negative of the reversal:

Pad by reflecting about the edge:

Pad antisymmetrically about the value at the edge:

Pad antisymmetrically about the edge of the array with reversed differences:

The differences are reflected about the edge of the original array:

Pad using linear extrapolation:

Pad using extrapolation of different orders:

Pad using the maximal extrapolation order:

ArrayPad works with SparseArray objects:

Lay out tiles by reflecting about their edges:

PadLeft[list,n] and PadRight[list,n] pad to make a list of length n:

ArrayPad[list,n] pads with n additional elements on each side:

ArrayPad[list,{-n,0}] is effectively Drop[list,n] for a one-dimensional list:

ArrayPad[list,{0,-n}] is effectively Drop[list,-n]:

A single number or pair of numbers is interpreted to apply in each dimension:

Explicitly specify the padding amount in each dimension:

Normally even empty array dimensions are padded:

With padding types that depend on array values, only nonempty array dimensions are padded:

Visualize the different named padding rules: