matlab中,在同一窗口,画均值为0,方差为1,2,3的正态分布密度曲线图

Question

如题所述

Answer 1

x=linspace(-5,5,501)';

y1=normpdf(x,0,1);

y2=normpdf(x,0,sqrt(2));

y3=normpdf(x,0,sqrt(3));

plot(x,[y1 y2 y3]);

legend('\sigma^2=1','\sigma^2=2','\sigma^2=3');