April 2020

Testing for Covid-19 in the U.S.

April 28, 2020 | arthur charpentier

For almost a month, on a daily basis, we are working with colleagues (Romuald, Chi and Mathieu) on modeling the dynamics of the recent pandemic. I learn of lot of things discussing with them, but we keep struggling with the tests. Paul, in Montréal, helped me a little bit, ...
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shinyFeedback 0.2.0 CRAN Release

April 28, 2020 | Posts on Tychobra

I am excited to announce that shinyFeedback 0.2.0 is on its way to CRAN (it may take a day or 2 for it to be available on your CRAN mirror). shinyFeedback is an R package that allows you to easily display user feedback in Shiny apps. shinyFeedback’s ...
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New Orleans and Normalization

April 28, 2020 | R on kieranhealy.org

My post about Apple’s mobility data from a few days ago has been doing the rounds. (People have been very kind.) Unsurprisingly, one of the most thoughtful responses came from Dr. Drang, who wrote up a great discussion about the importance of choosing the right baseline if you’re ... [Read more...]

lmSubsets: Exact variable-subset selection in linear regression

April 28, 2020 | Achim Zeileis

The R package lmSubsets for flexible and fast exact variable-subset selection is introduced and illustrated in a weather forecasting case study. Citation Hofmann M, Gatu C, Kontoghiorghes EJ, Colubi A, Zeileis A (2020). “lmSubsets: Exact Variable-Subset Selection in Linear Regression for R.” Journal of Statistical Software, 93(3), 1-21. doi:10.18637/jss.v093.i03 ...
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X is for scale_x

April 28, 2020 | Unknown

These next two posts will deal with formatting scales in ggplot2 - x-axis, y-axis - so I'll try to limit the amount of overlap and repetition.Let's say I wanted to plot my reading over time, specifically as a cumulative sum of pages across the year. My...
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RcppArmadillo 0.9.870.2.0

April 27, 2020 | Thinking inside the box

Armadillo is a powerful and expressive C++ template library for linear algebra aiming towards a good balance between speed and ease of use with a syntax deliberately close to a Matlab. RcppArmadillo integrates this library with the R environment and... [Read more...]

Local Snsitivity Hashing Model

April 27, 2020 | Modeling with R

Introduction Data Preparation Prediction Similarity based on distance The similarity based on the number of nearest neighbours Conclusion Further reading Introduction This model is an approximate version of knn model which is difficult to be implemented with large data set. In contrast to knn model that looks for the exact ...
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