/usr/share/octave/packages/signal-1.3.0/wconv.m is in octave-signal 1.3.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | ## Copyright (C) 2013 Lukas F. Reichlin
##
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{y} =} wconv (@var{type}, @var{x}, @var{f})
## @deftypefnx {Function File} {@var{y} =} wconv (@var{type}, @var{x}, @var{f}, @var{shape})
## 1-D or 2-D convolution.
##
## @strong{Inputs}
## @table @var
## @item type
## Type of convolution.
## @item x
## Signal vector or matrix.
## @item f
## Coefficients of @acronym{FIR} filter.
## @item shape
## Shape.
## @end table
##
## @strong{Outputs}
## @table @var
## @item y
## Convoluted signal.
## @end table
## @end deftypefn
## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
## Created: April 2013
## Version: 0.1
function y = wconv (type, x, f, shape = "full")
if (nargin < 3 || nargin > 4)
print_usage ();
endif
switch (type(1))
case {1, "1"}
y = conv2 (x(:).', f(:).', shape);
if (rows (x) > 1)
y = y.';
endif
case {2, "2"}
y = conv2 (x, f, shape);
case "r"
y = conv2 (x, f(:).', shape);
case "c"
y = conv2 (x.', f(:).', shape);
y = y.';
otherwise
print_usage ();
endswitch
endfunction
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