ex4answer.sas

本书详细讲解了sas的使用基础以及编程基础

**********************************
*                                *
*           Baokun Li            *
*  Excercise 4, due by July 2nd  *
*     SWUFE, Chengdu, Sichuan    *
*          July 1st, 2007        *
*                                *
**********************************;

*假定weight是以前建立的SAS数据集合，存放它的文件夹为d:\data;

libname mylib 'd:\data';
proc print data=mylib.weight;
run;

*共有100个观测记录;

data new;
set mylib.weight
(keep= clinic sex height weight bmi);
if bmi<25 then bodytype=1; else
if bmi>35 then bodytype=3; else
               bodytype=2;
title '从永久数据集合建立一数据集合，建立一新变量bodytype'
run;
proc means data=new min max maxdec=2;
class sex;
var weight height;
title 'weight和height的最大最小值'
run;

*把数据集合new变为一永久数据集合;
data mylib.new;
set new;
run;


quit;