@Override
public DoubleMatrix transpose() {
SparseDoubleRowMatrix m = new SparseDoubleRowMatrix(this.numColumns, this.numRows);
for (int row : this.matrix.keys()) {
Iterator<DoubleVectorElement> iterateNonZero = matrix.get(row).iterateNonZero();
while (iterateNonZero.hasNext()) {
DoubleVectorElement e = iterateNonZero.next();
m.set(e.getIndex(), row, e.getValue());
}
}
return m;
}
@Override
public DoubleMatrix add(DoubleMatrix other) {
SparseDoubleRowMatrix result =
new SparseDoubleRowMatrix(other.getRowCount(), other.getColumnCount());
for (int row : this.matrix.keys()) {
Iterator<DoubleVectorElement> iterate = matrix.get(row).iterate();
while (iterate.hasNext()) {
DoubleVectorElement e = iterate.next();
result.set(row, e.getIndex(), e.getValue() + other.get(row, e.getIndex()));
}
}
return result;
}
@Override
public DoubleMatrix divide(DoubleMatrix other) {
SparseDoubleRowMatrix m = new SparseDoubleRowMatrix(other);
for (int row : this.matrix.keys()) {
Iterator<DoubleVectorElement> iterateNonZero = matrix.get(row).iterateNonZero();
while (iterateNonZero.hasNext()) {
DoubleVectorElement e = iterateNonZero.next();
m.set(row, e.getIndex(), get(row, e.getIndex()) / other.get(row, e.getIndex()));
}
}
for (int col : other.columnIndices()) {
Iterator<DoubleVectorElement> iterateNonZero = other.getColumnVector(col).iterateNonZero();
while (iterateNonZero.hasNext()) {
DoubleVectorElement e = iterateNonZero.next();
m.set(e.getIndex(), col, get(e.getIndex(), col) / other.get(e.getIndex(), col));
}
}
return m;
}