Makoto YUI myui

Item-base collabolative filtering

1. Prepare transaction table

Prepare following transaction table. We are generating feature_vector for each item_id based on cooccurrence of purchased items, a sort of bucket analysis.

userid	item_id	purchase_at `timestamp`
1	31231	2015-04-9 00:29:02
1	13212	2016-05-24 16:29:02

CREATE TABLE bprmf_model
as
WITH t as (
  select
    bpr_sampling(userid, pos_items, "-sampling_rate 5.0")
      as (userid, pos_item, neg_item)
  from
    ranking_train
)

	set ytics nomirror
	set y2tics
	set yr[-20:20]

	plot \
	"cf2d.dat" using 1:2 with lines title "x", \
	"cf2d.dat" using 1:3 with lines title "outlier" axes x1y2, \
	"cf2d.dat" using 1:4 with lines title "change" axes x1y2

	set ytics nomirror
	unset y2tics
	set y2r[-200:300]
	set yr[0:60]
	set datafile separator " "

	plot \
	"hivemall_twitter2d.dat" using 1:2 with lines title "x" axes x1y2, \
	"hivemall_twitter2d.dat" using 1:3 with lines title "outlier" axes x1y1

	/*
	* Hivemall: Hive scalable Machine Learning Library
	*
	* Copyright (C) 2015 Makoto YUI
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0

	run: +main

	_export:
	td:
	apikey: ${TD_API_KEY}
	database: criteo
	engine: hive

	+main:
	+prepare:

	/*
	* Hivemall: Hive scalable Machine Learning Library
	*
	* Copyright (C) 2015 Makoto YUI
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0

	/*
	* Hivemall: Hive scalable Machine Learning Library
	*
	* Copyright (C) 2015 Makoto YUI
	* Copyright (C) 2013-2015 National Institute of Advanced Industrial Science and Technology (AIST)
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*