private void inActivityCluster(double[] tempTimeVector, String user) {
		double[] post_count = tempTimeVector;
		boolean contains = false;

		if (post_count[0] + post_count[1] + post_count[2] + post_count[3] == 0) {
			users0004.add(user);
			contains = true;
		}
		if (post_count[4] + post_count[5] + post_count[6] + post_count[7] == 0) {
			users0408.add(user);
			contains = true;
		}
		if (post_count[8] + post_count[9] + post_count[10] + post_count[11] == 0) {
			users0812.add(user);
			contains = true;
		}
		if (post_count[12] + post_count[13] + post_count[14] + post_count[15] == 0) {
			users1216.add(user);
			contains = true;
		}
		if (post_count[16] + post_count[17] + post_count[18] + post_count[19] == 0) {
			users1620.add(user);
			contains = true;
		}
		if (post_count[20] + post_count[21] + post_count[22] + post_count[23] == 0) {
			users2000.add(user);
			contains = true;
		}
		if (contains == false) {
			nullcluster.add(user);
		}
	}