David

David has asked 5 questions and find answers to 35 problems.

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David questions

How to specify a validation holdout set to caret
Downloading Reactive Objects in Shiny
pyspark using one task for mapPartitions when converting rdd to dataframe
Predicting LDA topics for new data

David answers

Count/frequency of observations by month
return indicies of rows in a CountVectorizer that have non-zero entries for a particular feature in scikit learn
R repetitive math equation over vector
R - data frame switch rows and columns
Passing variable names to model in shiny app
How to specify a validation holdout set to caret
Table of vector's means by two factors
GBM multinomial distribution, how to use predict() to get predicted class?
feature Union of hetereogenous features
scikit-learn custom transformer / pipeline that changes X and Y