[交流] 【讨论】Matlab如何把训练集和测试集的回归图画在一起？见附件【已完成】

Originally posted by hitzhang at 2009-10-11 14:19:
use
gscatter
or
plot,hold on,plot

Originally posted by hitzhang at 2009-10-11 18:03:
x=rand(1,100);
y=x+0.1*rand(1,100);
g=ones(1,100);g(50:100)=2;
gscatter(x,y,g);
hold on;
p = polyfit(x,y,1);
f = polyval(p,x);
plot(x,f)