X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Faudio-1.1.4%2Fclip.m;fp=octave_packages%2Faudio-1.1.4%2Fclip.m;h=fbfb78707764c7926e49fdd7c498addc5410d28f;hp=0000000000000000000000000000000000000000;hb=c880e8788dfc484bf23ce13fa2787f2c6bca4863;hpb=1705066eceaaea976f010f669ce8e972f3734b05

diff --git a/octave_packages/audio-1.1.4/clip.m b/octave_packages/audio-1.1.4/clip.m
new file mode 100644
index 0000000..fbfb787
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+++ b/octave_packages/audio-1.1.4/clip.m
@@ -0,0 +1,63 @@
+## Copyright (C) 1999 Paul Kienzle
+##
+## 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 2 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/>.
+
+## Clip values outside the range to the value at the boundary of the
+## range.
+##
+## X = clip(X)
+##   Clip to range [0, 1]
+##
+## X = clip(X, hi)
+##   Clip to range [0, hi]
+##
+## X = clip(X, [lo, hi])
+##   Clip to range [lo, hi]
+
+## TODO: more clip modes, such as three level clip(X, [lo, mid, hi]), which
+## TODO: sends everything above hi to hi, below lo to lo and between to
+## TODO: mid; or infinite peak clipping, which sends everything above mid
+## TODO: to hi and below mid to lo.
+
+function x = clip (x, range)
+
+  if (nargin == 2)
+    if (length(range) == 1)
+      range = [0, range];
+    end
+  elseif (nargin == 1)
+    range = [0, 1];
+  else
+    usage("X = clip(X [, range])");
+  end
+  try wfi = warning("query", "Octave:fortran-indexing").state;
+  catch wfi = "off";
+  end
+  unwind_protect
+    x (find (x > range (2))) = range (2);
+    x (find (x < range (1))) = range (1);
+  unwind_protect_cleanup
+    warning(wfi, "Octave:fortran-indexing");
+  end_unwind_protect
+
+endfunction
+
+%!error clip
+%!error clip(1,2,3)
+%!assert (clip(pi), 1)
+%!assert (clip(-pi), 0)
+%!assert (clip([-1.5, 0, 1.5], [-1, 1]), [-1, 0, 1]);
+%!assert (clip([-1.5, 0, 1.5]', [-1, 1]'), [-1, 0, 1]');
+%!assert (clip([-1.5, 1; 0, 1.5], [-1, 1]), [-1, 1; 0, 1]);
+%!assert (isempty(clip([],1)));