.BG
.FN dataset
.TL
dataset: Check for Existence of Datasets
.CS
dataset(name)
.PP
.AG name
character string giving the name of a dataset.
.RT
logical value: TRUE if `name' represents a dataset in one
of the data directories on the search list, FALSE otherwise.
.PP
If a prefix is in effect, `name' is searched for under the
prefix.
.EX
dataset("iris")   # does dataset named iris exist

prefix("state.")
if(dataset("x77")) stars(x77)	# operate on "state.x77" if it exists
.KW basic*
.KW data management
.WR
