[R] summarized data set - how to use an "occurs" field

[mloxton]

I have a data set with 22 fields and several thousand records in which
one field (count) indicates the number of times that each specific
combination of the other 21 fields occurred in a bigger and largely
unavailable data set.
So each record is unique in its combination of field values and has a
field that identifies how many multiples of this record actually
occurred.

Without resorting to writing a program that re-expands the data set to
several million rows by cloning each row by the number of times the
"count" field indicated, is there a way in R to use that field to come
up with summary stats and bargraphs of the distribution of any one of
the other fields?

best
Matthew