Mercurial > octave-nkf
view scripts/signal/arma_rnd.m @ 20216:aa36fb998a4d stable
maint: Remove unnecessary whitespace at end of lines.
* libgui/Makefile.am, libgui/graphics/Canvas.cc,
libgui/graphics/EditControl.cc, libgui/graphics/Figure.cc,
libgui/graphics/MouseModeActionGroup.cc, libgui/graphics/annotation-dialog.cc,
libgui/graphics/annotation-dialog.h, libgui/graphics/gl-select.cc,
libgui/graphics/module.mk, libgui/kb-layouts/default.keytab,
libgui/kb-layouts/linux.keytab, libgui/kb-layouts/vt420pc.keytab,
libgui/src/m-editor/find-dialog.cc, libgui/src/main-window.cc,
libgui/src/octave-qt-link.cc, libgui/src/octave-qt-link.h,
libgui/src/shortcut-manager.h, libinterp/corefcn/error.cc,
libinterp/corefcn/find.cc, libinterp/corefcn/gl2ps-renderer.cc,
libinterp/corefcn/graphics.cc, libinterp/corefcn/graphics.in.h,
libinterp/corefcn/octave-link.cc, libinterp/corefcn/quadcc.cc,
libinterp/corefcn/strfns.cc, libinterp/corefcn/syscalls.cc,
libinterp/corefcn/sysdep.cc, libinterp/corefcn/urlwrite.cc,
libinterp/corefcn/utils.cc, libinterp/corefcn/variables.cc,
libinterp/dldfcn/__init_fltk__.cc, libinterp/dldfcn/ccolamd.cc,
libinterp/dldfcn/colamd.cc, libinterp/octave-value/ov-bool-sparse.cc,
libinterp/octave-value/ov-classdef.cc, libinterp/octave-value/ov-re-sparse.cc,
libinterp/octave-value/ov-struct.cc, libinterp/parse-tree/pt-arg-list.cc,
scripts/audio/@audiorecorder/play.m, scripts/audio/wavwrite.m,
scripts/general/cart2sph.m, scripts/geometry/inpolygon.m,
scripts/gui/listdlg.m, scripts/gui/msgbox.m,
scripts/gui/private/message_dialog.m, scripts/help/get_first_help_sentence.m,
scripts/help/lookfor.m, scripts/image/imshow.m, scripts/io/strread.m,
scripts/java/javamem.m, scripts/miscellaneous/dir.m,
scripts/miscellaneous/edit.m, scripts/miscellaneous/genvarname.m,
scripts/miscellaneous/gzip.m, scripts/miscellaneous/private/__w2mpth__.m,
scripts/plot/appearance/annotation.m, scripts/plot/draw/colorbar.m,
scripts/plot/draw/quiver3.m, scripts/plot/util/hold.m,
scripts/plot/util/print.m, scripts/polynomial/mkpp.m,
scripts/polynomial/polyder.m, scripts/polynomial/spline.m,
scripts/polynomial/unmkpp.m, scripts/signal/arma_rnd.m, scripts/sparse/gplot.m,
scripts/statistics/tests/t_test.m,
scripts/statistics/tests/t_test_regression.m, scripts/strings/mat2str.m,
scripts/strings/strsplit.m, scripts/strings/strtrunc.m,
scripts/strings/untabify.m, scripts/testfun/assert.m:
maint: Remove unnecessary whitespace at end of lines.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 12 May 2015 09:22:01 -0700 |
parents | f1d0f506ee78 |
children |
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## Copyright (C) 1995-2015 Friedrich Leisch ## ## This file is part of Octave. ## ## Octave 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. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} arma_rnd (@var{a}, @var{b}, @var{v}, @var{t}, @var{n}) ## Return a simulation of the ARMA model. ## ## The ARMA model is defined by ## ## @example ## @group ## x(n) = a(1) * x(n-1) + @dots{} + a(k) * x(n-k) ## + e(n) + b(1) * e(n-1) + @dots{} + b(l) * e(n-l) ## @end group ## @end example ## ## @noindent ## in which @var{k} is the length of vector @var{a}, @var{l} is the length of ## vector @var{b} and @var{e} is Gaussian white noise with variance @var{v}. ## The function returns a vector of length @var{t}. ## ## The optional parameter @var{n} gives the number of dummy @var{x}(@var{i}) ## used for initialization, i.e., a sequence of length @var{t}+@var{n} is ## generated and @var{x}(@var{n}+1:@var{t}+@var{n}) is returned. If @var{n} ## is omitted, @var{n} = 100 is used. ## @end deftypefn ## Author: FL <Friedrich.Leisch@ci.tuwien.ac.at> ## Description: Simulate an ARMA process function x = arma_rnd (a, b, v, t, n) if (nargin == 4) n = 100; elseif (nargin == 5) if (! isscalar (n)) error ("arma_rnd: N must be a scalar"); endif else print_usage (); endif if ((min (size (a)) > 1) || (min (size (b)) > 1)) error ("arma_rnd: A and B must not be matrices"); endif if (! isscalar (t)) error ("arma_rnd: T must be a scalar"); endif ar = length (a); br = length (b); a = reshape (a, ar, 1); b = reshape (b, br, 1); ## Apply our notational convention. a = [1; -a]; b = [1; b]; n = min (n, ar + br); e = sqrt (v) * randn (t + n, 1); x = filter (b, a, e); x = x(n + 1 : t + n); endfunction