What function do you use in the caret package to determine the accuracy of your machine learning models?

confusionMatrix() predict() score() accuracy()

What function do you use to render a data visualization in a shiny server?

renderPlot() shinyGraph() renderGraph() shinyPlot()

What can you do with the 'by' parameter of a data.table?

Group the output table Select a specific column Add an extra row to your dataset Connect several filter criteria

Which of the following is not performed by Data Scientist ?

Create reproducible code Answer the question Challenge results Define the question

Where can you find a registry of add on packages for a specific field (e.g. Machine Learning, Time Series, Econometrics) ?

R Task View Stackoverflow Matlab Github