public Solver getYTYSolver() {
RealMatrix YTY;
Lock lock = yLock.readLock();
lock.lock();
try {
YTY = VectorMath.transposeTimesSelf(Y.values());
} finally {
lock.unlock();
}
return new LinearSystemSolver().getSolver(YTY);
}
public Solver getXTXSolver() {
RealMatrix XTX;
Lock lock = xLock.readLock();
lock.lock();
try {
XTX = VectorMath.transposeTimesSelf(X.values());
} finally {
lock.unlock();
}
return new LinearSystemSolver().getSolver(XTX);
}