code: public static void displayMatrix(double[][] matrix) {
          String line;
          for (int f = 0; f < matrix.length; f++) {
              line = "";
              for (int g = 0; g < matrix.length; g++) {
                  line += matrix[g][f] + " | ";
              }
              logger.debug(line);
          }
      }
docs: Lists a 2D double matrix to the System console.