calcbits.sci

基于SCILAB的The Genetic Algorithm Toolbox for SCILAB (GATS)工具箱

function [bits]=calcbits(bounds)
// function [bits]=calcbits(bounds,precision)
//
// Determine the number of bits to represent a float number to the precision
// provided.
//
// bits      - the number of bits required per variable
// bounds    - the bounds on the variables
// precision - the least difference to distinguish two numbers

// Binary and Real-Valued Simulation Evolution for Matlab 
// Copyright (C) 1996 C.R. Houck, J.A. Joines, M.G. Kay 
//
// C.R. Houck, J.Joines, and M.Kay. A genetic algorithm for function
// optimization: A Matlab implementation. ACM Transactions on Mathmatical
// Software, Submitted 1996.
//
// 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 1, 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. A copy of the GNU 
// General Public License can be obtained from the 
// Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

bits=ceil(log2((bounds(:,2)-bounds(:,1))' ./ bounds(:,3)'));
// bits=ceil(log( (bounds(:,2)-bounds(:,1))' .* 10.^precision+1) ./ log(2));