x = load('ex3x.dat');
y = load('ex3y.dat');
x = [ones(size(x,1),1) x];
meanx = mean(x);%求均值
sigmax = std(x);%求标准偏差
x(:,2) = (x(:,2)-meanx(2))./sigmax(2);
x(:,3) = (x(:,3)-meanx(3))./sigmax(3);
为什么要计算均值和标准差?
x = load('ex3x.dat');
y = load('ex3y.dat');
x = [ones(size(x,1),1) x];
meanx = mean(x);%求均值
sigmax = std(x);%求标准偏差
x(:,2) = (x(:,2)-meanx(2))./sigmax(2);
x(:,3) = (x(:,3)-meanx(3))./sigmax(3);
为什么要计算均值和标准差?