Library /sys$common/syshlp/pca$help.hlb EXCLUDE, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 n

    The parameter n is an integer representing the data kind to
    remove from the plot. This integer must be greater than one,
    because the data kind placed in the plot by the initial PLOT or
    TABULATE command is the first data kind and cannot be excluded.
    The data kind on the following line is considered to be number
    two, and so on. The default is the last data kind included.