Github user feynmanliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/7818#discussion_r36026148
--- Diff:
mllib/src/test/scala/org/apache/spark/mllib/fpm/PrefixSpanSuite.scala ---
@@ -50,64 +50,138 @@ class PrefixSpanSuite extends SparkFunSuite with
MLlibTestSparkContext {
val result1 = prefixspan.run(rdd)
val expectedValue1 = Array(
(Array(1), 4L),
- (Array(1, 3), 2L),
- (Array(1, 3, 4), 2L),
- (Array(1, 3, 4, 5), 2L),
- (Array(1, 3, 5), 2L),
- (Array(1, 4), 2L),
- (Array(1, 4, 5), 2L),
- (Array(1, 5), 2L),
+ (Array(1, -1, 3), 2L),
+ (Array(1, -1, 3, -1, 4), 2L),
+ (Array(1, -1, 3, -1, 4, -1, 5), 2L),
+ (Array(1, -1, 3, -1, 5), 2L),
+ (Array(1, -1, 4), 2L),
+ (Array(1, -1, 4, -1, 5), 2L),
+ (Array(1, -1, 5), 2L),
(Array(2), 2L),
- (Array(2, 1), 2L),
+ (Array(2, -1, 1), 2L),
(Array(3), 5L),
- (Array(3, 1), 2L),
- (Array(3, 3), 2L),
- (Array(3, 4), 3L),
- (Array(3, 4, 5), 2L),
- (Array(3, 5), 2L),
+ (Array(3, -1, 1), 2L),
+ (Array(3, -1, 3), 2L),
+ (Array(3, -1, 4), 3L),
+ (Array(3, -1, 4, -1, 5), 2L),
+ (Array(3, -1, 5), 2L),
(Array(4), 4L),
- (Array(4, 5), 2L),
+ (Array(4, -1, 5), 2L),
(Array(5), 3L)
)
- assert(compareResults(expectedValue1, result1.collect()))
+ compareResults(expectedValue1, result1.collect())
prefixspan.setMinSupport(0.5).setMaxPatternLength(50)
val result2 = prefixspan.run(rdd)
val expectedValue2 = Array(
(Array(1), 4L),
(Array(3), 5L),
- (Array(3, 4), 3L),
+ (Array(3, -1, 4), 3L),
(Array(4), 4L),
(Array(5), 3L)
)
- assert(compareResults(expectedValue2, result2.collect()))
+ compareResults(expectedValue2, result2.collect())
prefixspan.setMinSupport(0.33).setMaxPatternLength(2)
val result3 = prefixspan.run(rdd)
val expectedValue3 = Array(
(Array(1), 4L),
- (Array(1, 3), 2L),
- (Array(1, 4), 2L),
- (Array(1, 5), 2L),
- (Array(2, 1), 2L),
+ (Array(1, -1, 3), 2L),
+ (Array(1, -1, 4), 2L),
+ (Array(1, -1, 5), 2L),
+ (Array(2, -1, 1), 2L),
(Array(2), 2L),
(Array(3), 5L),
- (Array(3, 1), 2L),
- (Array(3, 3), 2L),
- (Array(3, 4), 3L),
- (Array(3, 5), 2L),
+ (Array(3, -1, 1), 2L),
+ (Array(3, -1, 3), 2L),
+ (Array(3, -1, 4), 3L),
+ (Array(3, -1, 5), 2L),
(Array(4), 4L),
- (Array(4, 5), 2L),
+ (Array(4, -1, 5), 2L),
(Array(5), 3L)
)
- assert(compareResults(expectedValue3, result3.collect()))
+ compareResults(expectedValue3, result3.collect())
+ }
+
+ test("PrefixSpan using Integer type, variable-size itemsets") {
+ val sequences = Array(
+ Array(1, -1, 1, 2, 3, -1, 1, 3, -1, 4, -1, 3, 6),
+ Array(1, 4, -1, 3, -1, 2, 3, -1, 1, 5),
+ Array(5, 6, -1, 1, 2, -1, 4, 6, -1, 3, -1, 2),
+ Array(5, -1, 7, -1, 1, 6, -1, 3, -1, 2, -1, 3))
+ val rdd = sc.parallelize(sequences, 2).cache()
+ val prefixspan = new
PrefixSpan().setMinSupport(0.5).setMaxPatternLength(5)
+ val result = prefixspan.run(rdd)
+ val expectedValue = Array(
--- End diff --
OK
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