docs: def set_ylimits(self, row, column, min=None, max=None):
          """Set y-axis limits of a subplot.
  
          :param row,column: specify the subplot.
          :param min: minimal axis value
          :param max: maximum axis value
  
          """
          subplot = self.get_subplot_at(row, column)
          subplot.set_ylimits(min, max)