Example: Ranks
In this data from Hinkley (1977) note that the fourth and sixth observations are tied and that the third and twentieth are tied.
import com.imsl.stat.*;
import com.imsl.math.*;
public class RanksEx1 {
public static void main(String args[]) {
double x[] = {
0.77, 1.74, 0.81, 1.20, 1.95, 1.20, 0.47, 1.43,
3.37, 2.20, 3.00, 3.09, 1.51, 2.10, 0.52, 1.62,
1.31, 0.32, 0.59, 0.81, 2.81, 1.87, 1.18, 1.35,
4.75, 2.48, 0.96, 1.89, 0.90, 2.05};
PrintMatrixFormat mf = new PrintMatrixFormat();
mf.setNoRowLabels();
mf.setNoColumnLabels();
Ranks ranks = new Ranks();
double score[] = ranks.getRanks(x);
new PrintMatrix("The Ranks of the Observations - " +
"Ties Averaged").print(mf, score);
System.out.println();
ranks = new Ranks();
ranks.setTieBreaker(ranks.TIE_HIGHEST);
score = ranks.getBlomScores(x);
new PrintMatrix("The Blom Scores of the Observations - " +
"Highest Score used in Ties").print(mf, score);
System.out.println();
ranks = new Ranks();
ranks.setTieBreaker(ranks.TIE_LOWEST);
score = ranks.getTukeyScores(x);
new PrintMatrix("The Tukey Scores of the Observations - " +
"Lowest Score used in Ties").print(mf, score);
System.out.println();
ranks = new Ranks();
ranks.setTieBreaker(ranks.TIE_RANDOM);
Random random = new Random();
random.setSeed(123457);
random.setMultiplier(16807);
ranks.setRandom(random);
score = ranks.getVanDerWaerdenScores(x);
new PrintMatrix("The Van Der Waerden Scores of the " +
"Observations - Ties untied by Random").print(mf, score);
}
}
Output
The Ranks of the Observations - Ties Averaged
5
18
6.5
11.5
21
11.5
2
15
29
24
27
28
16
23
3
17
13
1
4
6.5
26
19
10
14
30
25
9
20
8
22
The Blom Scores of the Observations - Highest Score used in Ties
-1.024
0.209
-0.776
-0.294
0.473
-0.294
-1.61
-0.041
1.61
0.776
1.176
1.361
0.041
0.668
-1.361
0.125
-0.209
-2.04
-1.176
-0.776
1.024
0.294
-0.473
-0.125
2.04
0.893
-0.568
0.382
-0.668
0.568
The Tukey Scores of the Observations - Lowest Score used in Ties
-1.02
0.208
-0.89
-0.381
0.471
-0.381
-1.599
-0.041
1.599
0.773
1.171
1.354
0.041
0.666
-1.354
0.124
-0.208
-2.015
-1.171
-0.89
1.02
0.293
-0.471
-0.124
2.015
0.89
-0.566
0.381
-0.666
0.566
The Van Der Waerden Scores of the Observations - Ties untied by Random
-0.989
0.204
-0.753
-0.287
0.46
-0.372
-1.518
-0.04
1.518
0.753
1.131
1.3
0.04
0.649
-1.3
0.122
-0.204
-1.849
-1.131
-0.865
0.989
0.287
-0.46
-0.122
1.849
0.865
-0.552
0.372
-0.649
0.552
Link to Java source.