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Top Questions
17
votes
With unbalanced class, do I have to use under sampling on my validation/testing datasets?
machine-learning
dataset
sampling
asked Nov 18, 2015 at 20:14
datascience.stackexchange.com
13
votes
Do I have to standardize my new polynomial features?
machine-learning
dataset
data-cleaning
data
asked Nov 25, 2015 at 11:11
datascience.stackexchange.com
8
votes
Spark Is there any rule of thumb about the optimal number of partition of a RDD and its number of elements?
apache-spark
apache-spark-sql
partitioning
asked Mar 15, 2016 at 11:01
stackoverflow.com
8
votes
When do I have to use aucPR instead of auROC? (and vice versa)
machine-learning
data-mining
cross-validation
evaluation
asked Nov 24, 2015 at 11:50
datascience.stackexchange.com
6
votes
How to select a subset of fields from an array column in Spark?
scala
apache-spark
dataframe
apache-spark-sql
asked Apr 7, 2016 at 12:34
stackoverflow.com
Top Answers
10
One Hot encoding for large number of values
datascience.stackexchange.com
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