Returns a vector of names or positions of databases that contain an object.
USAGE:
find(what, mode = "any", numeric. = F)
REQUIRED ARGUMENTS:
what:
the name of an object.
OPTIONAL ARGUMENTS:
mode:
character string giving a mode to restrict the search.
numeric.:
logical flag specifying whether the returned value should be numeric
or character.
VALUE:
if numeric.=F, a character vector of names of those databases
currently attached which contain what; if numeric.=T, a numeric vector
of positions of these databases in the search list, whose
names attribute is then the vector of database names.