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Feature/fixed_create_and_border #112

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Feature/fixed_create_and_border #112

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6735668
fixed bad dimension for child and made border dynamic
degiorgig Aug 30, 2023
6d78999
adapted bmi to the new signature
degiorgig Aug 30, 2023
ce2ebbc
new signature to pass variable parameters number
degiorgig Aug 30, 2023
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37 changes: 23 additions & 14 deletions src/main/java/ch/idsia/crema/preprocess/creators/CreateCPT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
import ch.idsia.crema.factor.credal.linear.interval.IntervalFactorFactory;
import ch.idsia.crema.utility.IndexIterator;

import java.util.ArrayList;
import java.util.Arrays;

public class CreateCPT {
Expand All @@ -19,21 +20,29 @@ public class CreateCPT {
*/
public double[] borders(double[] lower, double[] upper, Op operation) {

//shortcut in case the function is strictly monotone growing
//double[] extremes= new double[]{operation.execute(lower[0], upper[1]), operation.execute(upper[0], lower[1])};
//return Arrays.stream(extremes).sorted().toArray();
int DIM = (int) Math.pow(2, lower.length);
double[] results = new double[DIM];

double[] results = new double[2 * lower.length];
results[0] = operation.execute(lower[0], lower[1]);
results[1] = operation.execute(lower[0], upper[1]);
results[2] = operation.execute(upper[0], lower[1]);
results[3] = operation.execute(upper[0], upper[1]);

Arrays.sort(results);
double firstElement = results[0];
double lastElement = results[results.length - 1];
for (int i = 0; i < DIM; i++) {
StringBuilder binary = new StringBuilder(Integer.toBinaryString(i));
for(int j = binary.length(); j < lower.length; j++) {
binary.insert( 0, '0' );
}
ArrayList<Double> paramList = new ArrayList<>();

for(int j = 0; j < binary.length(); j++) {
if(binary.charAt(j) == '0') {
paramList.add(lower[j]);
} else {
paramList.add(upper[j]);
}
}
results[i] = operation.execute(paramList.stream().mapToDouble(Double::doubleValue).toArray());
}

return new double[]{firstElement, lastElement};
return new double[]{
Arrays.stream(results).min().isPresent()? Arrays.stream(results).min().getAsDouble(): 0.0,
Arrays.stream(results).max().isPresent()? Arrays.stream(results).max().getAsDouble(): 0.0};
}

/**
Expand All @@ -51,7 +60,7 @@ public IntervalFactor create(int childVar, int[] parentsVars, double[] childCuts

// root nodes creation
// add child node
int dimChild = childCuts.length + 1;
int dimChild = childCuts.length-1;
Strides stridesChild = Strides.var(childVar, dimChild);

// create domain
Expand Down
2 changes: 1 addition & 1 deletion src/main/java/ch/idsia/crema/preprocess/creators/Op.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,5 +2,5 @@

@FunctionalInterface
public interface Op {
double execute(double a, double b);
double execute(double... params);
}
20 changes: 10 additions & 10 deletions src/test/java/ch/idsia/crema/preprocess/creators/CreateCPTTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,34 +19,34 @@ public void testCreate() {
double[] cutsBMI = new double[]{0.0, 15.0, 16, 18.5, 25.0, 30.0, 35.0, 40.0, 100.0};

double[][] parents = new double[][]{cutsW, cutsH};
Op bmi = (w, h) -> w / h / h;
Op bmi = (double... num) -> num[0] / num[1] / num[1];

IntervalFactor cpt = creator.create(2, new int[]{0, 1}, cutsBMI, parents, bmi);
//System.out.println(cpt);

// w1 and h1
assertArrayEquals(cpt.getLower(0, 0), new double[10]);
assertArrayEquals(cpt.getUpper(0, 0), creator.createUpper(new int[]{4}, 10));
assertArrayEquals(cpt.getLower(0, 0), new double[8]);
assertArrayEquals(cpt.getUpper(0, 0), creator.createUpper(new int[]{4}, 8));

// w2 and h1
assertArrayEquals(cpt.getLower(1, 0), new double[10]);
assertArrayEquals(cpt.getUpper(1, 0), creator.createUpper(new int[]{4, 5}, 10));
assertArrayEquals(cpt.getLower(1, 0), new double[8]);
assertArrayEquals(cpt.getUpper(1, 0), creator.createUpper(new int[]{4, 5}, 8));

// w5 and h6
assertArrayEquals(cpt.getLower(4, 5), new double[10]);
assertArrayEquals(cpt.getUpper(4, 5), creator.createUpper(new int[]{4}, 10));
assertArrayEquals(cpt.getLower(4, 5), new double[8]);
assertArrayEquals(cpt.getUpper(4, 5), creator.createUpper(new int[]{4}, 8));

// w12 and h9
assertArrayEquals(cpt.getLower(11, 8), new double[10]);
assertArrayEquals(cpt.getUpper(11, 8), creator.createUpper(new int[]{5, 6}, 10));
assertArrayEquals(cpt.getLower(11, 8), new double[8]);
assertArrayEquals(cpt.getUpper(11, 8), creator.createUpper(new int[]{5, 6}, 8));
}

@Test
public void testBorders() {
double[] parentIntervalLower = new double[]{55.0, 1.55};
double[] parentIntervalUpper = new double[]{60.0, 1.60};
//example of the BMI
Op bmi = (w, h) -> w / h / h;
Op bmi = (double... num) -> num[0] / num[1] / num[1];

//bmi low = 21.48
//bmi high = 24.97
Expand Down
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