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Help for the archive contributions
From: |
Oscar Marquez [GTS] |
Subject: |
Help for the archive contributions |
Date: |
Fri, 24 Jan 1997 12:56:54 +0000 (WET) |
Hi Octavers,
I want now to reorganize the archive of contributions for octave 2.x
and need your help:
Please, if you have a function file to the archive put the following
two tags anywhere on the preamble:
## Description:
## Author:
The first tag contents the short description of the function, the
second tag the name and email address from the autor.
Example:
======================================================================
## Copyright (C) 1995, 1996 Friedrich Leisch
##
## 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, 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 file. If not, write to the Free Software
## Foundation,
## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
## usage: H = hurst (x)
##
## Estimates the Hurst parameter of sample x via the rescaled range
## statistic. If x is a matrix, the parameter is estimated for every
## single column.
## Author: FL <address@hidden>
## Description: Estimates the Hurst parameter of sample x
## Author: Friedrich.Leisch <address@hidden>
function H = hurst (x)
if (nargin != 1)
usage ("hurst (x)");
endif
if is_vector (x)
x = reshape (x, length (x), 1);
elseif !is_matrix (x)
error ("hurst: x must be a vector or a matrix");
endif
[xr xc] = size (x);
s = std (x);
w = cumsum (x - mean (x));
RS = (max(w) - min(w)) ./ s;
H = log (RS) / log (xr);
endfunction
========================================================================
Regards,
Oscar
--
Oscar W. Marquez F. Universidad de Vigo
address@hidden ETSI de Telecomunicacion
Tel. ++34-86-812 675 Lagoas-Marcosende
Fax. ++34-86-812 116 E-36280 Vigo - Spain
From address@hidden Sat Jan 25 11:05:45 1997
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