click_pos

The click_pos UDF computes either a reciprocal rank or a raw click position (using a 0-based index) of a document in a page of results. This UDF is used to compute the mean reciprocal rank (MRR) for experiments. For example, given the following list of documents and a doc ID, the click_pos UDF will return 2:

docs: a,b,c,d
doc ID: c