code: public static FloatMatrix floori(FloatMatrix x) { 
  		/*# mapfct('Math.floor') #*/
  //RJPP-BEGIN------------------------------------------------------------
  	   for (int i = 0; i < x.length; i++)
  	      x.put(i, (float) Math.floor(x.get(i)));
  	   return x;
  //RJPP-END--------------------------------------------------------------
  	}
docs: Element-wise round down by applying the <i>floor</i> function on each
  element. Note that this is an in-place operation.
  @see MatrixFunctions#floor(FloatMatrix)
  @return this matrix