Someone

for(int i = 0; i < traces.size(); i++)
			{
				double sum = 0.0;
				for(int j = 0; j < numClusters; j++)
				{
					coefficients[i][j] = counter.calcRatioDist(traces.get(i), clusters[j].getCenter());
					if(coefficients[i][j] == -1)
						return new Cluster[0];
					sum += coefficients[i][j]; 
				}//for
				for(int j = 0; j < numClusters; j++)
				{
					coefficients[i][j] = coefficients[i][j] / sum;
				}
			}//for