该系统使用极其简便

				
				%svm2_figure:to look the figure of input data
				%==============
				%==============
				
				clc
				
				iris = load('example42_iris.txt');
				
				x = iris(:,3:4);
				y = 2*(iris(:,5) == 2)-1;
				
				
				
				figure('name','输入数据图示','numbertitle','off');
				
				plot(x(find(y==1),1)',x(find(y==1),2)','bs',x(find(y==-1),1)',x(find(y==-1),2)','ko')
				axis(axis + [-0.1 +0.1 -0.1 +0.1])
				legend('class one','class two',0);