SAS PROC REPORT 列中的条件输出

Question

我正在尝试学习 SAS，特别是 PROC REPORT。我正在使用 SASHELP.CARS 数据集。

我想在输出的第 6 列中实现的目标，标记为“汽车数量 > 平均值（发票）”，以计算发票大于集团发票平均值的汽车数量。我正在使用下面的代码。

PROC REPORT DATA=sashelp.CARS NOWD OUT=learning.MyFirstReport;
COLUMNS Type Origin INVOICE=Max_INVOICE INVOICE=Mean_Invoice 
INVOICE=Count_Invoice TEST DriveTrain;
DEFINE Type / Group 'Type of Car' CENTER;
DEFINE Origin / Group 'Origin of Car' CENTER;
DEFINE Max_Invoice / ANALYSIS MAX 'Max of Invoice';
DEFINE Mean_Invoice / ANALYSIS MEAN 'Mean of Invoice';
DEFINE Count_Invoice / ANALYSIS N FORMAT=5.0 'Total Number of Cars' center;
DEFINE DriveTrain / ACROSS 'Type of DriveTrain of Car';
DEFINE TEST / COMPUTED 'Number of Cars > Mean(Invoice)' center;
COMPUTE TEST;
     TEST=N(_c7_>Mean_Invoice);
ENDCOMP;
RUN;

我得到的输出如下图所示。

Output of the above SAS code

我认为这不是正确的输出，因为列中的所有行都显示值 1。如何在输出的第 6 列中获得所需的输出？

Answer 1

非组列被定义为计算聚合统计的分析。实现逻辑评估计数的一种方法是准备数据，以便单个标志（0 或 1）的 SUM 聚合是肯定断言的计数。

准备

proc sql;
  create view cars_v as
  select *
  , mean(invoice) as invoice_mean_over_type_origin
  , (invoice > calculated invoice_mean_over_type_origin) as flag_50
  from sashelp.cars
  group by type, origin
  ;

举报

PROC REPORT DATA=CARS_V OUT=work.MyFirstReport;
COLUMNS 
  Type 
  Origin 
  INVOICE/*=Max_INVOICE */
  INVOICE=INVOICE_use_2/*=Mean_Invoice */

  flag_50
  flag_50=flag_50_use_2

  flag_50_other
  DriveTrain
;
  DEFINE Type / Group 'Type of Car' CENTER;
  DEFINE Origin / Group 'Origin of Car' CENTER;
  DEFINE Invoice / ANALYSIS MAX 'Max of Invoice';
  DEFINE Invoice_use_2 / ANALYSIS MEAN 'Mean of Invoice';

  DEFINE flag_50 / analysis sum  'Number of Cars > Mean ( Invoice )' center;

  DEFINE flag_50_use_2 / noprint analysis N  ;
  * noprint makes a hidden column whose value is available to compute blocks;

  DEFINE flag_50_other / computed 'Number of Cars <= Mean ( Invoice )' center;
  DEFINE DriveTrain / ACROSS 'Type of DriveTrain of Car';

  compute flag_50_other;
    flag_50_other = flag_50_use_2 - flag_50.sum;
  endcomp;
RUN;

• 在较新版本的 SAS 中，NOWD 是默认选项。新的Proc REPORT 代码不需要明确指定。
• 重用诸如invoice=mean_invoice 之类的变量是可以的，但是代码的未来读者在看到DEFINE Mean_Invoice / ANALYSIS MEAN 'Mean of Invoice'; 代码行时可能会有一些误解——这是mean 的定义或平均值的平均值 ?