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Example 3 for PROC REG

/****************************************************************/
/*          S A S   S A M P L E   L I B R A R Y                 */
/*                                                              */
/*    NAME: regex3                                              */
/*   TITLE: Example 3 for PROC REG                              */
/*          Age, Weight, and Height of Children                 */
/*    DATA: htwt                                                */
/* PRODUCT: STAT                                                */
/*  SYSTEM: ALL                                                 */
/*    KEYS: Output data sets, BY processing                     */
/*   PROCS: REG                                                 */
/*                                                              */
/* SUPPORT: Robert Cohen                                        */
/****************************************************************/
*------------Data on Age, Weight, and Height of Children-------*
| Age (months), height (inches), and weight (pounds) were      |
| recorded for a group of school children.                     |
| From Lewis and Taylor (1967).                                |
*--------------------------------------------------------------*;

data htwt;
   input sex $ age :3.1 height weight @@;
   datalines;
f 143 56.3  85.0 f 155 62.3 105.0 f 153 63.3 108.0 f 161 59.0  92.0
f 191 62.5 112.5 f 171 62.5 112.0 f 185 59.0 104.0 f 142 56.5  69.0
f 160 62.0  94.5 f 140 53.8  68.5 f 139 61.5 104.0 f 178 61.5 103.5
f 157 64.5 123.5 f 149 58.3  93.0 f 143 51.3  50.5 f 145 58.8  89.0
f 191 65.3 107.0 f 150 59.5  78.5 f 147 61.3 115.0 f 180 63.3 114.0
f 141 61.8  85.0 f 140 53.5  81.0 f 164 58.0  83.5 f 176 61.3 112.0
f 185 63.3 101.0 f 166 61.5 103.5 f 175 60.8  93.5 f 180 59.0 112.0
f 210 65.5 140.0 f 146 56.3  83.5 f 170 64.3  90.0 f 162 58.0  84.0
f 149 64.3 110.5 f 139 57.5  96.0 f 186 57.8  95.0 f 197 61.5 121.0
f 169 62.3  99.5 f 177 61.8 142.5 f 185 65.3 118.0 f 182 58.3 104.5
f 173 62.8 102.5 f 166 59.3  89.5 f 168 61.5  95.0 f 169 62.0  98.5
f 150 61.3  94.0 f 184 62.3 108.0 f 139 52.8  63.5 f 147 59.8  84.5
f 144 59.5  93.5 f 177 61.3 112.0 f 178 63.5 148.5 f 197 64.8 112.0
f 146 60.0 109.0 f 145 59.0  91.5 f 147 55.8  75.0 f 145 57.8  84.0
f 155 61.3 107.0 f 167 62.3  92.5 f 183 64.3 109.5 f 143 55.5  84.0
f 183 64.5 102.5 f 185 60.0 106.0 f 148 56.3  77.0 f 147 58.3 111.5
f 154 60.0 114.0 f 156 54.5  75.0 f 144 55.8  73.5 f 154 62.8  93.5
f 152 60.5 105.0 f 191 63.3 113.5 f 190 66.8 140.0 f 140 60.0  77.0
f 148 60.5  84.5 f 189 64.3 113.5 f 143 58.3  77.5 f 178 66.5 117.5
f 164 65.3  98.0 f 157 60.5 112.0 f 147 59.5 101.0 f 148 59.0  95.0
f 177 61.3  81.0 f 171 61.5  91.0 f 172 64.8 142.0 f 190 56.8  98.5
f 183 66.5 112.0 f 143 61.5 116.5 f 179 63.0  98.5 f 186 57.0  83.5
f 182 65.5 133.0 f 182 62.0  91.5 f 142 56.0  72.5 f 165 61.3 106.5
f 165 55.5  67.0 f 154 61.0 122.5 f 150 54.5  74.0 f 155 66.0 144.5
f 163 56.5  84.0 f 141 56.0  72.5 f 147 51.5  64.0 f 210 62.0 116.0
f 171 63.0  84.0 f 167 61.0  93.5 f 182 64.0 111.5 f 144 61.0  92.0
f 193 59.8 115.0 f 141 61.3  85.0 f 164 63.3 108.0 f 186 63.5 108.0
f 169 61.5  85.0 f 175 60.3  86.0 f 180 61.3 110.5 m 165 64.8  98.0
m 157 60.5 105.0 m 144 57.3  76.5 m 150 59.5  84.0 m 150 60.8 128.0
m 139 60.5  87.0 m 189 67.0 128.0 m 183 64.8 111.0 m 147 50.5  79.0
m 146 57.5  90.0 m 160 60.5  84.0 m 156 61.8 112.0 m 173 61.3  93.0
m 151 66.3 117.0 m 141 53.3  84.0 m 150 59.0  99.5 m 164 57.8  95.0
m 153 60.0  84.0 m 206 68.3 134.0 m 250 67.5 171.5 m 176 63.8  98.5
m 176 65.0 118.5 m 140 59.5  94.5 m 185 66.0 105.0 m 180 61.8 104.0
m 146 57.3  83.0 m 183 66.0 105.5 m 140 56.5  84.0 m 151 58.3  86.0
m 151 61.0  81.0 m 144 62.8  94.0 m 160 59.3  78.5 m 178 67.3 119.5
m 193 66.3 133.0 m 162 64.5 119.0 m 164 60.5  95.0 m 186 66.0 112.0
m 143 57.5  75.0 m 175 64.0  92.0 m 175 68.0 112.0 m 175 63.5  98.5
m 173 69.0 112.5 m 170 63.8 112.5 m 174 66.0 108.0 m 164 63.5 108.0
m 144 59.5  88.0 m 156 66.3 106.0 m 149 57.0  92.0 m 144 60.0 117.5
m 147 57.0  84.0 m 188 67.3 112.0 m 169 62.0 100.0 m 172 65.0 112.0
m 150 59.5  84.0 m 193 67.8 127.5 m 157 58.0  80.5 m 168 60.0  93.5
m 140 58.5  86.5 m 156 58.3  92.5 m 156 61.5 108.5 m 158 65.0 121.0
m 184 66.5 112.0 m 156 68.5 114.0 m 144 57.0  84.0 m 176 61.5  81.0
m 168 66.5 111.5 m 149 52.5  81.0 m 142 55.0  70.0 m 188 71.0 140.0
m 203 66.5 117.0 m 142 58.8  84.0 m 189 66.3 112.0 m 188 65.8 150.5
m 200 71.0 147.0 m 152 59.5 105.0 m 174 69.8 119.5 m 166 62.5  84.0
m 145 56.5  91.0 m 143 57.5 101.0 m 163 65.3 117.5 m 166 67.3 121.0
m 182 67.0 133.0 m 173 66.0 112.0 m 155 61.8  91.5 m 162 60.0 105.0
m 177 63.0 111.0 m 177 60.5 112.0 m 175 65.5 114.0 m 166 62.0  91.0
m 150 59.0  98.0 m 150 61.8 118.0 m 188 63.3 115.5 m 163 66.0 112.0
m 171 61.8 112.0 m 162 63.0  91.0 m 141 57.5  85.0 m 174 63.0 112.0
m 142 56.0  87.5 m 148 60.5 118.0 m 140 56.8  83.5 m 160 64.0 116.0
m 144 60.0  89.0 m 206 69.5 171.5 m 159 63.3 112.0 m 149 56.3  72.0
m 193 72.0 150.0 m 194 65.3 134.5 m 152 60.8  97.0 m 146 55.0  71.5
m 139 55.0  73.5 m 186 66.5 112.0 m 161 56.8  75.0 m 153 64.8 128.0
m 196 64.5  98.0 m 164 58.0  84.0 m 159 62.8  99.0 m 178 63.8 112.0
m 153 57.8  79.5 m 155 57.3  80.5 m 178 63.5 102.5 m 142 55.0  76.0
m 164 66.5 112.0 m 189 65.0 114.0 m 164 61.5 140.0 m 167 62.0 107.5
m 151 59.3  87.0
;
proc reg outest=est1 outsscp=sscp1 rsquare;
   by sex;
   eq1: model  weight=height;
   eq2: model  weight=height age;
run;

proc print data=sscp1;
   title2 'SSCP type data set';
run;

proc print data=est1;
   title2 'EST type data set';
run;