exm040931_1.m

好多m文件

Lambda=20;x=0:50;yd_p=poisspdf(x,Lambda);  
yd_n=normpdf(x,Lambda,sqrt(Lambda));  

plot(x,yd_n,'b-',x,yd_p,'r+')
text(30,0.07,'\fontsize{12} {\mu} = {\lambda} = 20')	%MATLAB新指令