generic_dataset::get_markers

Source: dataset/generic/generic_dataset__get_markers.pro

 generic_dataset::get_markers
        Return markers of the dataset

 Usage:
        mark = dsref -> get_markers([index=index|/pointer])

 Keywords:
        index   int     input   Which marker(s) to return
        pointer                 If set then return the pointer
        count                   If set, then return the number of markers

 History:
        Original: 31/5/02; SJT
        Add count key: 5/6/02; SJT