/** @return an element */
public double getElement(int row, int column) {
if (!distancesKnown) {
calculateDistances();
}
return distances[row][column];
}
/** set an element - this overwrites any existing elements */
public void setElement(int row, int column, double value) {
if (!distancesKnown) {
calculateDistances();
}
distances[row][column] = value;
}
/** Returns the mean pairwise distance of this matrix */
public double getMeanDistance() {
if (!distancesKnown) {
calculateDistances();
}
double dist = 0.0;
int count = 0;
for (int i = 0; i < dimension; i++) {
for (int j = 0; j < dimension; j++) {
if (i != j) {
dist += distances[i][j];
count += 1;
}
}
}
return dist / (double) count;
}