sas means

means 是proc步一个过程
可以用来计算一些统计变量
平均值 频率 权重
用法如下：
PROC MEANS <option(s)> <statistic-keyword(s)>; BY <DESCENDING> variable-1 <... <DESCENDING> variable-n><NOTSORTED>;
CLASS variable(s) </ option(s)>;
FREQ variable;
ID variable(s);
OUTPUT <OUT=SAS-data-set> <output-statistic-specification(s)>
<id-group-specification(s)> <maximum-id-specification(s)>
<minimum-id-specification(s)> </ option(s)> ;
TYPES request(s);
VAR variable(s) < / WEIGHT=weight-variable>;
WAYS list;
WEIGHT variable;


lsmeans 是GLM 和 MIXED底下的一个
最小二乘算法的语句
LSMEANS fixed-effects < / options > ;