matrix_dataset::get_layout

Source: dataset/matrix/matrix_dataset__get_layout.pro

 matrix_dataset::get_layout
        Return the layout of a matrix dataset (i.e. do we plot
        headers?).

 Usage:
        hdr = dsref -> get_layout()

 History:
        Original: 16/6/00; SJT
        Added (currently dummy) header key: 20/6/00