code: public void setColumn(int j, Vector column) {
          if (rows != column.length()) {
              fail("Wrong vector length: " + column.length() + ". Should be: " + rows + ".");
          }
  
          for (int i = 0; i < column.length(); i++) {
              set(i, j, column.get(i));
          }
      }
docs: Copies given {@code column} into the specified column of this matrix.
  
  @param j the column index
  @param column the column represented as vector