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C++ API

: y = filter2 (b, x)

: y = filter2 (b, x, shape)

Apply the 2-D FIR filter b to x.

If the argument shape is specified, return an array of the desired shape. Possible values are:

"full"

pad x with zeros on all sides before filtering.

"same"

unpadded x (default)

"valid"

trim x after filtering so edge effects are no included.

Note this is just a variation on convolution, with the parameters reversed and b rotated 180 degrees.

See also: conv2.

Package: octave