Hi Franklyn,
I had the same problem like yours with vectors & Maps. I tried:
1) UDF --> cumbersome and difficult to maintain. One has to re-write /
re-implement UDFs + extensive docs should be provided for colleagues +
something weird may happen when you migrate to new Spark version
2) RDD /
As a reference this is what is required to coalesce a vector column in
pyspark.
df = sc.sql.createDataFrame([(SparseVector(10,{1:44}),), (None,),
(SparseVector(10,{1:23}),), (None,), (SparseVector(10,{1:35}),)],
schema=schema
empty_vector = sc.sql.createDataFrame([(SparseVector(10, {}),)],
We've developed Scala UDFs internally to address some of these issues and
we'd love to upstream them back to spark. Just trying to figure out what
the vector support looks like on the road map.
would it be best to put this functionality into the Imputer,
VectorAssembler or maybe try to give it
>From the documentation it states that ` The input columns should be of
DoubleType or FloatType.` so i dont think that is what im looking for. Also
in general the API around vectors is highly lacking, especially from the
pyspark side.
Very common vector operations like addition, subtractions and
Since 2.2 there is Imputer:
https://github.com/apache/spark/blob/branch-2.2/examples/src/main/python/ml/imputer_example.py
which should at least partially address the problem.
On 06/22/2017 03:03 AM, Franklyn D'souza wrote:
> I just wanted to highlight some of the rough edges around using
>
