RObservations #4 Using Base R to Clean Data

November 23, 2020 | Benjamin Smith

A friend of mine had some data which was mixed with character strings and was interested in looking at the numeric data only; Because the data set was quite large, cleaning it manually wasn’t viable. Besides for being too great of a task to do manually – tampering with the ... [Read more...]

pointblank v0.6

November 23, 2020 | Posts | R & R

With the release of pointblank v0.6, workflows for the validation of tabular data have been refined. On top of those improvements, we have a new workflow for describing our tabular data. There’s really so much that’s new in the release that we can only go over the big ...
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COVID-19 dashboard page now up

November 23, 2020 | Nathan

I aggregated the visualizations from my previous two posts on COVID-19 cases in Arkansas and the U.S. on a separate landing page. I wanted a quick place to look a few times a week at how my home state is handling the coronavirus pandemic (spoiler alert... [Read more...]

Undersampling Will Change the Base Rates of Your Model’s Predictions

November 22, 2020 | rstats on Bryan Shalloway's Blog

Create Data Association of ‘feature’ and ‘target’ Resample Build Models Rescale Predictions to Predicted Probabilities Appendix Density Plots Lift Plot TLDR: In classification problems, under and over sampling1 techniques shift the distribution of predicted probabilities towards the minority class. If your problem requires accurate probabilities you will need to adjust ...
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Online Tests for TestVision with R/exams

November 22, 2020 | R/exams

Generating, importing, and customizing online tests for TestVision with R/exams. Motivation This tutorial illustrates how to use R/exams for creating online exams for TestVision. Testvision is a Dutch commercial onlin... [Read more...]
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