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[SPARK-19634][ML] Multivariate summarizer - dataframes API #18798

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[SPARK-19634][ML] Multivariate summarizer - dataframes API #18798

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281d546
init pr
WeichenXu123 Jul 30, 2017
2860390
optimize summarizer buffer
WeichenXu123 Jul 30, 2017
4f32e27
update
WeichenXu123 Aug 7, 2017
6053d0e
ignore perf test
WeichenXu123 Aug 7, 2017
b02db42
add performance note
WeichenXu123 Aug 8, 2017
7540c4c
small updates
WeichenXu123 Aug 15, 2017
b081fc3
fix style
WeichenXu123 Aug 15, 2017
c82958f
add experimental tag
WeichenXu123 Aug 15, 2017
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24 changes: 13 additions & 11 deletions mllib/src/main/scala/org/apache/spark/ml/linalg/VectorUDT.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -27,17 +27,7 @@ import org.apache.spark.sql.types._
*/
private[spark] class VectorUDT extends UserDefinedType[Vector] {

override def sqlType: StructType = {
// type: 0 = sparse, 1 = dense
// We only use "values" for dense vectors, and "size", "indices", and "values" for sparse
// vectors. The "values" field is nullable because we might want to add binary vectors later,
// which uses "size" and "indices", but not "values".
StructType(Seq(
StructField("type", ByteType, nullable = false),
StructField("size", IntegerType, nullable = true),
StructField("indices", ArrayType(IntegerType, containsNull = false), nullable = true),
StructField("values", ArrayType(DoubleType, containsNull = false), nullable = true)))
}
override final def sqlType: StructType = _sqlType

override def serialize(obj: Vector): InternalRow = {
obj match {
Expand Down Expand Up @@ -94,4 +84,16 @@ private[spark] class VectorUDT extends UserDefinedType[Vector] {
override def typeName: String = "vector"

private[spark] override def asNullable: VectorUDT = this

private[this] val _sqlType = {
// type: 0 = sparse, 1 = dense
// We only use "values" for dense vectors, and "size", "indices", and "values" for sparse
// vectors. The "values" field is nullable because we might want to add binary vectors later,
// which uses "size" and "indices", but not "values".
StructType(Seq(
StructField("type", ByteType, nullable = false),
StructField("size", IntegerType, nullable = true),
StructField("indices", ArrayType(IntegerType, containsNull = false), nullable = true),
StructField("values", ArrayType(DoubleType, containsNull = false), nullable = true)))
}
}
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