protected boolean expand(
int oldRowSize,
int oldColumnSize,
int newRowSize,
int newColumnSize,
WeightGenerator generator) {
if (newRowSize < oldRowSize) newRowSize = oldRowSize;
if (newColumnSize < oldColumnSize) newColumnSize = oldColumnSize;
boolean expanded = false;
// expand columns
if (oldColumnSize < newColumnSize) {
int i, j, diff = newColumnSize - oldColumnSize, size = oldRowSize * newColumnSize;
for (i = oldColumnSize; i < size; i += newColumnSize)
for (j = 0; j < diff; j++) weights.add(i + j, generator == null ? 0 : generator.next());
setColumnSize(newColumnSize);
expanded = true;
}
// expand label dimension
if (oldRowSize < newRowSize) {
int i, size = newRowSize * newColumnSize;
for (i = weights.size(); i < size; i++) weights.add(generator == null ? 0 : generator.next());
setRowSize(newRowSize);
expanded = true;
}
return expanded;
}
/** @return a copy of this vector where all the values are initialized to 0. */
public MajorVector createZeroVector() {
MajorVector vector = createInstance();
vector.setSizes(label_size, feature_size);
vector.weights = new FloatGapList();
for (int i = 0; i < weights.size(); i++) vector.weights.add(0);
return vector;
}
public float get(int index) {
return weights.get(index);
}
@Override
public String toString() {
return weights.toString();
}
public int size() {
return weights.size();
}
public void set(int index, float value) {
weights.set(index, value);
}
