public double[] columnVariances(){
            double[] variances = new double[this.numberOfColumns];
            for(int i=0; i<this.numberOfColumns; i++){
                double[] hold = new double[this.numberOfRows];
                for(int j=0; j<this.numberOfRows; j++){
                    hold[i] = this.matrix[j][i];
                }
                Stat st = new Stat(hold);
                variances[i] = st.variance();
            }

            return variances;
        }