/**
* Return true if a value can be considered for mixture estimatino separately from the data
* indexed between i0 and i1
*
* @param data the data supposedly generated from the mixture
* @param i0 the index of the first element in the group
* @param i1 the index of the last element in the group
* @param x the value
* @return true if the value can be considered
*/
public boolean separable(DoubleVector data, int i0, int i1, double x) {
double p = 0;
for (int i = i0; i <= i1; i++) {
p += Maths.pnorm(-Math.abs(x - data.get(i)));
}
if (p < separatingThreshold) return true;
else return false;
}
/**
* Contructs the probability matrix for mixture estimation, given a set of support points and a
* set of intervals.
*
* @param s the set of support points
* @param intervals the intervals
* @return the probability matrix
*/
public PaceMatrix probabilityMatrix(DoubleVector s, PaceMatrix intervals) {
int ns = s.size();
int nr = intervals.getRowDimension();
PaceMatrix p = new PaceMatrix(nr, ns);
for (int i = 0; i < nr; i++) {
for (int j = 0; j < ns; j++) {
p.set(
i,
j,
Maths.pnorm(intervals.get(i, 1), s.get(j), 1)
- Maths.pnorm(intervals.get(i, 0), s.get(j), 1));
}
}
return p;
}
