跟着学制表

今天看了一篇文章,《INTRODUCTION TO PROC TABULATE》，作者Thomas J. Winn, Jr。这一篇文章比很多书上讲的要详细的多，包括《The little sas book》以及帮助文档。文章的将制表步骤分为五部分，大致内容如下（对应proc tabulate基本语法）：

制表基本语法：

PROC TABULATE <option-list>;
         CLASS <class-variable-list>;
         VAR <analysis-variable-list>;
         TABLE <<page-expression,>
                           row-expression,>
                           column-expression
                          </ table-option-list>;
         BY <NOTSORTED> <DESCENDING> variable-1
                          < ... <DESCENDING> variable-n>;
         FORMAT variable-list-1 format-1
                         <... variable-list-n format-n>;
         FREQ variable;
         KEYLABEL keyword-1=‘description-1’
                          < ... keyword-n=’description-n’>;
         LABEL variable-1=‘label-1’
                          < ... variable-n=’label-n’>;
         WEIGHT variable;

第一步：分类变量的设定，该步要用到CLASS语句。

例：PROC TABULATE DATA=sashelp.prdsale;
            CLASS country division product;

第二步：分析变量的设定，该步用到VAR语句.

例：PROC TABULATE DATA=sashelp.prdsale;
           CLASS country division product;
           VAR actual;

第三步：表格维度的定义，该步用TABLE语句。table语句中经常用到逗号，两个逗号三维表，一个逗号二维表，没有逗号表只有一维也就是只有列而且只有一行。还有*号，通常表示分类变量的交互。括号表示一组.

形如：TABLE page-expression, row-expression, column-expression . . .;
        TABLE row-expression, column-expression . . .; or
        TABLE column-expression . . .;

例：TABLE var1, var2;    TABLE var1, var2 var3;   TABLE var1, var2*var3;   

      TABLE var1, var2 * (var3 var4) var5 ;等等     

第四步：统计量的设定，诸如N,MIN,MAX,MEAN,STD,VAR,MEDIAN,SKEWNESS,SUM,PCTN,PCTSUM等等。这一步情况最复杂，内容也是最多，仅列一例。

例：PROC TABULATE DATA=tabwkshp.empldata;/*empldata是作者合并sas9.1 sample数据库empinfo, jobcodes, and salary得到的*/
            CLASS jobcode location gender;
            TABLE jobcode, location*gender; /*生成行为jobcode，列分层location和gender的频数表*/
            TABLE jobcode*PCTN, location*gender;/*百分数的表，表类型同上*/
            TABLE jobcode, location*gender*PCTN;/*同上*/
            TABLE jobcode PCTN, location* gender;/*生成频数表，但会多出一列数据总量的百分比*/

第五步：设置表格的格式和标签。

例：PROC FORMAT;
              VALUE salfmt low-<12000 = ‘Less than $12,000’
                             12000-<24000 = ‘$12,000 - $23,999’
                             24000-<48000 = ‘$24,000 - $47,999’
                             48000-<72000 = ‘$48,000 - $71,999’
                             72000-<96000 = ‘$72,000 - $95,999’
                             96000-<120000 = ‘$96,000 - $119,999’
                                    120000-high = ‘$120,000 or more’;
     RUN;
     ODS HTML BODY=‘tables.htm’;
     PROC TABULATE DATA=sashelp.empldata MISSING FORMAT=9.1;
              CLASS title location gender salary;
              FORMAT salary salfmt.;
              LABEL title = ‘Job Title’;
              KEYLABEL PCTN = ‘Percent’ ALL = ‘Total’;
              TABLE title*salary ALL, (location*gender ALL)*PCTN
                                                   / RTS=50 MISSTEXT=‘0’;
             TITLE ‘Tabular Summary of Employee Information’;
    RUN;
    ODS HTML CLOSE;
    RUN;