add x and y as attributes to the returned
pairs. This makes calling some subsequent operations that need x and
y (such as compare_pairs easier.
chunk_size
used when large = TRUE to specify the approximate
number of pairs that are kept in memory.
Value
When large is FALSE, a data.frame with two columns,
x and y, is returned. Columns x and y are
row numbers from data.frames x and y respectively.
When large is TRUE, an object of type ldat is returned.
Details
Generating (all) pairs of the records of two data sets, is usually the first
step when linking the two data sets. However, this often results in a too
large number of records. Therefore, blocking is usually applied.