计算平均值时SAS PROC SQL错误

Question

我试图计算年平均值和最高和最低温度的标准偏差。我的代码如下：

 PROC SQL;
 create table new2 as
  select date,SUM(max_temp) as max_temp,SUM(min_temp) as min_temp,
 SUM(precip) as precip
   from WORK.ROCH_DATA 
    group by date;

 create table average2 as 
  select year(date) as year,(date) as year2,avg(max_temp) as maxavg,
avg(min_temp) as minavg, avg(precip) as avgprecip, std(max_temp) as
stdmaxtemp,
  std(min_temp) as stdmintemp,std(precip) as stdprecip
   from new2
    group by year;
 QUIT;

我的代码最终吐出了类似的东西;

它重复了第二年和第二年专栏（我只想要一个适当的年份，即1916.1917），并不断重新计算一年。我如何让它向我展示我数据中50年的单一计算？ （即排除重新计算）

Answer 1

因为这是你第四次问同样的问题，这是一个答案，虽然我没有看到其他几个问题出了什么问题。 两种使用proc的方法。您可以使用输出或ODS OUTPUT，我已对两者进行了编码但不是必需的。您的最终结果是3个数据集应该具有您想要的，可能采用不同的格式。

proc means data=roch_data noprint stackods;
class date;
format date year4.;
var max_temp min_temp precip;
output out=summary_proc_mean1 mean= std= /autoname;
ods output summary=summary_proc_mean2;
run;

使用Proc SQL

PROC SQL;
create table average2 as 
  select year(date) as year,
    avg(max_temp) as maxavg,
    avg(min_temp) as minavg, 
    avg(precip) as avgprecip, 
    std(max_temp) as stdmaxtemp,
    std(min_temp) as stdmintemp,
        std(precip) as stdprecip
   from roch_data
    group by year;
 QUIT;