Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/9302#discussion_r43753637
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala ---
@@ -107,6 +107,25 @@ class RFormulaSuite extends SparkFunSuite with
MLlibTestSparkContext {
assert(result.collect() === expected.collect())
}
+ test("index string label") {
+ val formula = new RFormula().setFormula("id ~ a + b")
+ val original = sqlContext.createDataFrame(
+ Seq(("male", "foo", 4), ("female", "bar", 4), ("female", "bar", 5),
("male", "baz", 5))
+ ).toDF("id", "a", "b")
+ val model = formula.fit(original)
+ val result = model.transform(original)
+ val resultSchema = model.transformSchema(original.schema)
+ val expected = sqlContext.createDataFrame(
+ Seq(
+ ("male", "foo", 4, Vectors.dense(0.0, 1.0, 4.0), 1.0),
+ ("female", "bar", 4, Vectors.dense(1.0, 0.0, 4.0), 0.0),
+ ("female", "bar", 5, Vectors.dense(1.0, 0.0, 5.0), 0.0),
+ ("male", "baz", 5, Vectors.dense(0.0, 0.0, 5.0), 1.0))
+ ).toDF("id", "a", "b", "features", "label")
+ // assert(result.schema.toString == resultSchema.toString)
--- End diff --
Currently disable this assert due to ```StringIndexer``` output
inconsistent ```nullable```, I opened
[SPARK-11478](https://issues.apache.org/jira/browse/SPARK-11478) to track that
issue. After it resolved, this assert will be enabled.
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