资源简介
产生分类中的双月问题的数据集 0积分下载
代码片段和文件信息
function data=dbmoon(Ndrw)
% Usage: data=dbmoon(Ndrw)
% doublemoon.m - genereate the double moon data set in Haykin‘s book titled
% “neural networks and learning machine“ third edition 2009 Pearson
% Figure 1.8 pp. 61
% The data set contains two regions A and B representing 2 classes
% each region is a half ring with radius r = 10 width = 6 one is upper
% half and the other is lower half
% d: distance between the two regions
% will generate region A centered at (0 0) and region B is a mirror image
% of region A (w.r.t. x axis) with a (r d) shift of origin
% N: # of samples each class default = 1000
% d: seperation of two class negative value means overlapping (default=1)
% r: radius (default=10) w: width of ring (default=6)
%
% (C) 2010 by Yu Hen Hu
% Created: Sept. 3 2010
% clear all; close all;
if nargin<4 w=6;
elseif nargin<3 r=10;
elseif nargin<2 d=1;
elseif nargin < 1 N=1000;
end
% generate region A:
% f
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