/*************  train.sas ************************
 Nested Example from NKNW Ch. 28 (Table 28.1)
**************************************************/

options linesize = 79;

proc format;  /* value labels used in data step below */
     value cityfmt 1 = 'Atlanta'  2 = 'Chicago' 3 = 'San Francisco';
data school;
     infile 'training.dat';
     input city teacher learning;
     format city cityfmt.;
proc glm;
     class city teacher;
     model learning = city teacher(city) ;
     means city teacher(city);