用SAS可以产生这样的随机数吗？

previal 发表于 2010-5-30 11:02
用SAS可以产生这样的随机数吗？比如产生只包括0 ，5 和10 的100个数，其概率分别为0.7,0.2和0.1

Yes!. Here is a brief explanation from online help.

The RANTBL function returns a variate that is generated from the probability mass function defined by p1 through pn . An inverse transform method applied to a RANUNI uniform variate is used.

A sample program attached below,

data t1;
seed=99612;
n=10000;   
p1=0.7;p2=0.2;p3=0.1;
array  a{3} _temporary_  (0,5,10) ;
do i = 1 to n;
    x=a{rantbl(seed,of p1-p3)};
    output;
end;
keep x;
run;

proc freq data=t1;
table x;
run;

11# bobguy

bobguy每次的代码都能让我学习到东西。
专业啊。

6# jingju11
学习了~~

赞的，标记一下；

12# hongxx

Agree.
Indeed, she/he is knowledgeable and helpful.
In essence, it is to generate numbers following by a multinomial distribution.

学习了，对的，主要是这个
问题的算法思想

牛啊！又学习了一招！