One-way ANOVA models are fit with either an explicit or implicit intercept. In implicit intercept models, the ANOVA table of PROC TRANSREG is the correct table for a model with an intercept, and the regression table is the correct table for a model that does not have a separate explicit intercept. The PROC TRANSREG implicit intercept ANOVA table matches the PROC REG table when the NOINT a-option is not specified, and the PROC TRANSREG implicit intercept regression table matches the PROC REG table when the NOINT a-option is specified. The following statements illustrate this relationship and produce Figure 90.75:

   data oneway;
      input y x $;
      datalines;
   0 a
   1 a
   2 a
   7 b
   8 b
   9 b
   3 c
   4 c
   5 c
   ;

   title 'Implicit Intercept Model';
   
   proc transreg ss2 data=oneway short;
      model identity(y) = class(x / zero=none);
      output out=oneway2;
   run;
   
   proc reg data=oneway2;
      model y = xa xb xc;         /* Implicit Intercept ANOVA      */
      model y = xa xb xc / noint; /* Implicit Intercept Regression */
   run; quit;