def set_value(sheet, element, index, set_value, col):
    """Set the value in the dataset at position index/col.

    Parameters
    ----------
    sheet : a :class:`Sheet` object
    element : str: 'cell' or 'face' or 'edge' or 'vert'
    index : index in the datasets[element]
    set_value : value to set.
    col : column from dataset which apply increase_rate.
    """
    sheet.datasets[element].loc[index, col] = set_value
