public WeightVector(WeightVector wv){
  float in[]=wv.getInternalArray();
  u=new float[in.length];
  System.arraycopy(in,0,u,0,in.length);
  size=in.length;
}

public WeightVector ( WeightVector wv ) { float in [ ] = wv . getInternalArray ( ) ; u = new float [ in . length ] ; System . arraycopy ( in , 0 , u , 0 , in . length ) ; size = in . length ; }
duplicate a weight vector
