/**
* Returns a representation of of the population in the form of a table, where each row represents
* one individual, one parameter per column, and the last column containing the objective value.
*
* @returns a table represeting the population.
*/
public Table getTable() {
Table vt;
int rowCount = solutions.length;
int colCount = ranges.length + 1;
Column[] cols = new Column[colCount];
// make a column for each range
for (int i = 0; i < ranges.length; i++) {
Column c;
if (ranges[i] instanceof DoubleRange) {
c = new DoubleColumn(rowCount);
for (int j = 0; j < rowCount; j++) {
double d = solutions[j].getDoubleParameter(i);
((DoubleColumn) c).setDouble(d, j);
}
} else if (ranges[i] instanceof IntRange) {
c = new IntColumn(rowCount);
for (int j = 0; j < rowCount; j++) {
int in = (int) solutions[j].getDoubleParameter(i);
((IntColumn) c).setInt(in, j);
}
} else if (ranges[i] instanceof BinaryRange) {
c = new BooleanColumn(rowCount);
for (int j = 0; j < rowCount; j++) {
boolean b = (solutions[j].getDoubleParameter(i) > 0);
((BooleanColumn) c).setBoolean(b, j);
}
} else { // i guess default to a double column
c = new DoubleColumn(rowCount);
for (int j = 0; j < rowCount; j++) {
double d = solutions[j].getDoubleParameter(i);
((DoubleColumn) c).setDouble(d, j);
}
}
c.setLabel(ranges[i].getName());
cols[i] = c;
}
// now the objective
DoubleColumn objC = new DoubleColumn(rowCount);
objC.setLabel(objConstraints.getName());
for (int j = 0; j < rowCount; j++) {
objC.setDouble(solutions[j].getObjective(), j);
}
cols[colCount - 1] = objC;
vt = new MutableTableImpl(cols);
return vt;
}
/* returns a string with info on the ranges, obj constraints, etc
*/
public String getSpaceDefinitionString() {
StringBuffer sb = new StringBuffer();
sb.append("\nRanges:\n");
sb.append("\t_Name_\t_Min_\t_Max_\n");
for (int i = 0; i < ranges.length; i++) {
sb.append("\t");
sb.append(ranges[i].getName());
sb.append("\t");
sb.append(ranges[i].getMin());
sb.append("\t");
sb.append(ranges[i].getMax());
sb.append("\n");
}
sb.append("\nObjective Constraint:\n");
sb.append("\t_Name_\t_Is Maximizing?_\n");
sb.append("\t");
sb.append(objConstraints.getName());
sb.append("\t");
sb.append(objConstraints.isMaximizing());
sb.append("\n");
return (sb.toString());
}
/**
* Compare one member to another. This requires knowledge of the fitness function which cannot be
* supplied here, hence must be provided in a subclass.
*
* @returns 1 if member indexed a is greater than b, 0 if they are equal, -1 if member indexed by
* a is less than b.
*/
public int compareSolutions(Solution a, Solution b) {
double af = ((SOSolution) a).getObjective();
double bf = ((SOSolution) b).getObjective();
return objConstraints.compare(af, bf);
}