A table-reading function can be associated with an agent or informant
with set_read_fn()
. Should both a tbl
and a read_fn
be associated
with the agent or informant, the read_fn
will take priority. There are
two ways to specify a read_fn
: (1) using a function (e.g.,
function() { <table reading code> }
) or, (2) with an R formula expression
(e.g., ~ { <table reading code> }
). The table-reading function can removed
with remove_read_fn()
.
set_read_fn(x, read_fn)
An agent object of class ptblank_agent
, or, an informant of
class ptblank_informant
.
A function that's used for reading in the data. This can be
specified by using a function (e.g., function() { <table reading code> }
)
or an R formula expression (e.g., ~ { <table reading code> }
).
8-5
Other Object Ops:
remove_read_fn()
,
remove_tbl()
,
set_tbl()
,
x_read_disk()
,
x_write_disk()