%% 生成二类线性可分数据

function [feature, category]=generate_sample(step,error)

aa=3; %斜率

bb=3; %截距

b1=1;

rr =error;

s=step;

x1(:,1) = -1:s:1;

n = length(x1(:,1));

x1(:,2) = aa.*x1(:,1) + bb + b1 + rr*abs(randn(n,1));

y1 = -ones(n,1);

x2(:,1) =  -1:s:1;

x2(:,2) = aa.*x2(:,1) + bb - b1 - rr*abs(randn(n,1));

y2 = ones(n,1);

%figure;

%plot(x1(:,1),x1(:,2),'bx',x2(:,1),x2(:,2),'k.');

feature=[x1;x2];

category=[y1;y2];