sinewave.m

JAVA 数学程序库 提供常规的数值计算程序包

## Copyright (C) 1995, 1996, 1997  Andreas Weingessel
##
## 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 2, 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, write to the Free
## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
## 02110-1301, USA.

## -*- texinfo -*-
## @deftypefn {Function File} {} sinewave (@var{m}, @var{n}, @var{d})
## Return an @var{m}-element vector with @var{i}-th element given by
## @code{sin (2 * pi * (@var{i}+@var{d}-1) / @var{n})}.
##
## The default value for @var{d} is 0 and the default value for @var{n}
## is @var{m}.
## @end deftypefn

## Author: AW <[e-mail]>
## Description: Compute a sine wave

function x = sinewave (m, n, d)

  if ((nargin > 0) && (nargin < 4))
    if (nargin < 3)
      d = 0;
    endif
    if (nargin < 2)
      n = m;
    endif
    x = sin (((1 : m) + d - 1) * 2 * pi / n);
  else
    usage ("sinewave (m, n, d)");
  endif

endfunction

/*
@GROUP
signal
@SYNTAX
sinwave()
@DOC
.
@EXAMPLES
.
@NOTES
.
@SEE

*/