/usr/share/octave/packages/specfun-1.1.0/heaviside.m is in octave-specfun 1.1.0-1build1.
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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 | ## Copyright (C) 2006 Sylvain Pelissier <sylvain.pelissier@gmail.com>
##
## 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} {} heaviside(@var{x})
## @deftypefnx{Function File} {} heaviside(@var{x}, @var{zero_value})
## Compute the Heaviside step function.
##
## The Heaviside function is defined as
##
## @example
## Heaviside (@var{x}) = 1, @var{x} > 0
## Heaviside (@var{x}) = 0, @var{x} < 0
## @end example
##
## @noindent
## The value of the Heaviside function at @var{x} = 0 is by default 0.5,
## but can be changed via the optional second input argument.
## @seealso{dirac}
## @end deftypefn
function y = heaviside (x, zero_value = 0.5)
if (nargin < 1)
print_usage ();
endif
y = cast (x > 0, class (x));
y (x == 0) = zero_value;
endfunction
|