This has some asserts that exactly one row is passed in and exaclty one row is returned, but otherwise it just calls rowPairApply.
rowPairApply2Rows(row1, row2, ...)
The first row of cues (will apply cols_to_fit for you, based on object).
The second row (will apply cols_to_fit for you, based on object).
The functions that generate the functions to apply, such as heuristics(ttb) and correctGreater(col).
A matrix of function outputs.
rowPairApply
to apply to all row pairs in a matrix or
data.frame.