public double[] columnStandardDeviations(){
            double[] standardDeviations = 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);
                standardDeviations[i] = st.standardDeviation();
            }

            return standardDeviations;
        }