1THIS IS DATAPLOT DATA FILE     HALD647.DAT
2HEAT YIELD IN HARDENING OF PORTLAND CEMENT
3REFERENCE--HALD, A., STATISTICAL THEORY WITH ENGINEERING
4           APPLICATIONS, WILEY, NEW YORK, 1952, PAGE 647.
5REFERENCE--DANIEL, CUTHERBERT, AND WOOD, FRED S.
6           FITTING EQUATIONS TO DATA, WILEY, NEW YORK, 1971,
7           PAGES 89 AND 100.
8NUMBER OF OBSERVATIONS = 13
9NUMBER OF VARIABLES PER LINE IMAGE = 5
10ORDER OF VARIABLES PER LINE IMAGE--
11   RESPONSE VARIABLE Y = HEAT EVOLVED (CAL/GRAM OF CEMENT)
12   FACTOR 1            = CONCENTRATION OF COMPOUND 1
13   FACTOR 2            = CONCENTRATION OF COMPOUND 2
14   FACTOR 3            = CONCENTRATION OF COMPOUND 3
15   FACTOR 4            = CONCENTRATION OF COMPOUND 4
16STATISTICAL CLASSIFICATION--REGRESSION
17       ALL-POSSIBLE SUBSETS REGRESSION
18TO READ THIS INTO DATAPLOT--
19SKIP 25
20READ HALD647.DAT Y X1 X2 X3 X4
21
22 HEAT     CONC CONC CONC CONC
23YIELD       1    2    3    4
24
25-----------------------------
26 78.5       7   26    6   60
27 74.3       1   29   15   52
28104.3      11   56    8   20
29 87.6      11   31    8   47
30 95.9       7   52    6   33
31109.2      11   55    9   22
32102.7       3   71   17    6
33 72.5       1   31   22   44
34 93.1       2   54   18   22
35115.9      21   47    4   26
36 83.8       1   40   23   34
37113.3      11   66    9   12
38109.4      10   68    8   12
39