SAS 9.4 Duncan’s Multiple Range Test Grouping（Duncan分组）

问题：

我正在尝试使用 Duncan 分组进行方差分析。但是，结果窗口仅显示颜色代码（右）而不是字母代码（左）。如何将结果转换为字母代码？

解答：

示例地址

https://v8doc.sas.com/sashtml/stat/chap17/sect26.htm

   title 'Nitrogen Content of Red Clover Plants';
   data Clover;
      input Strain $ Nitrogen @@;
      datalines;
   3DOK1  19.4 3DOK1  32.6 3DOK1  27.0 3DOK1  32.1 3DOK1  33.0
   3DOK5  17.7 3DOK5  24.8 3DOK5  27.9 3DOK5  25.2 3DOK5  24.3
   3DOK4  17.0 3DOK4  19.4 3DOK4   9.1 3DOK4  11.9 3DOK4  15.8
   3DOK7  20.7 3DOK7  21.0 3DOK7  20.5 3DOK7  18.8 3DOK7  18.6
   3DOK13 14.3 3DOK13 14.4 3DOK13 11.8 3DOK13 11.6 3DOK13 14.2
   COMPOS 17.3 COMPOS 19.4 COMPOS 19.1 COMPOS 16.9 COMPOS 20.8
   ;

   proc anova;
      class Strain;
      model Nitrogen = Strain;
      means Strain / duncan waller;
   run;

Waller-Duncan k-ratio t 检验的结果显示如下：

修改代码如下，添加LINESTABLE选项

LINES 通过按降序列出均值并按线段指示不显著的子集来显示选项的结果

LINESTABLE 以表格形式显示 LINES 选项的结果

代码

   title 'Nitrogen Content of Red Clover Plants';
   data Clover;
      input Strain $ Nitrogen @@;
      datalines;
   3DOK1  19.4 3DOK1  32.6 3DOK1  27.0 3DOK1  32.1 3DOK1  33.0
   3DOK5  17.7 3DOK5  24.8 3DOK5  27.9 3DOK5  25.2 3DOK5  24.3
   3DOK4  17.0 3DOK4  19.4 3DOK4   9.1 3DOK4  11.9 3DOK4  15.8
   3DOK7  20.7 3DOK7  21.0 3DOK7  20.5 3DOK7  18.8 3DOK7  18.6
   3DOK13 14.3 3DOK13 14.4 3DOK13 11.8 3DOK13 11.6 3DOK13 14.2
   COMPOS 17.3 COMPOS 19.4 COMPOS 19.1 COMPOS 16.9 COMPOS 20.8
   ;

   proc anova;
      class Strain;
      model Nitrogen = Strain;
      means Strain / duncan waller LINESTABLE;
   run;

结果如下：