public static double MAE(float[][] originalMatrix, float[][] removedMatrix, float[][] predictedMatrix){
		double allMAE = 0;
		double number = 0;
		for (int i = 0; i < originalMatrix.length; i++) {
			for (int j = 0; j < originalMatrix[0].length; j++) {
				if(removedMatrix[i][j] == -2 && originalMatrix[i][j] != -1 && predictedMatrix[i][j] != -2) {
					allMAE += Math.abs(predictedMatrix[i][j] - originalMatrix[i][j]);
					number ++;
				}
			}
		}
		return allMAE/number;
	}