We were surprised to see that R has passed SAS for scholarly use. We were surprised because we assumed this would have happened years ago. The post R is now the number two statistical computing program in scholarly use appeared first on Decision Science News. [Read more...]

Reshape your data from long to wide, split a column, aggregate: a comparison between tidyr and reshape2 R packages to tidy data The post How to reshape data in R: tidyr vs reshape2 appeared first on MilanoR. [Read more...]

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In today’s lesson we’ll take care of the baseline issue we had in the last lesson when we have a linear model with an interaction. To do that we’ll be learning about analysis of variance or ANOVA. We’ll also be going over how to make barplots ... [Read more...]

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Feature selection is a process of extracting valuable features that have significant influence on dependent variable. This is still an active field of research and machine wandering. In this post I compare few feature selection algorithms: traditional GLM with regularization, computationally demanding Boruta and entropy based filter from FSelectorRcpp (free ... [Read more...]

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Quick public service announcement for my fellow R nerds: R has two commonly-used random-Normal generators: rnorm and MASS::mvrnorm. I was foolish and assumed that their parameterizations were equivalent when you’re generating univariate data. But nope: Base R can generate univariate … Continue reading → [Read more...]

I worked a bit over the weekend preparing my talk to be delivered at the seminar organized by IBPAD this week at University of Brasilia, addressing the interfaces of Big Data and Society. I was invited to present the R package SciencesPo for an eclectic crowd. Eclectic in terms of ... [Read more...]

Suppose you divide the range by four instead of taking the standard deviation. How accurate will you be? The post Can’t compute the standard deviation in your head? Divide the range by four. appeared first on Decision Science News. [Read more...]

The team at DataCamp announced a new R/Finance course series in a recent email:Subject: Data Mining Tutorial, R/Finance course series, and more!R/Finance - A new course series in the worksWe are working on a whole new course series on applied finance u... [Read more...]

Congratulations to Peter Aldhous and Charles Seife of Buzzfeed News, winners of the 2016 Data Journalism Award for Data Visualization of the Year. They were recognized by their reporting for Spies in the Sky, which analyzed FAA air traffic records to visulize the domestic surveillance activities of the US government. Aldhouse ... [Read more...]

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The aggregate() function subsets dataframes, and time series data, then computes summary statistics. The structure of the aggregate() function is aggregate(x, by, FUN). Answers to the exercises are available here. Exercise 1 Aggregate the “airquality” data by “airquality$Month“, returning means on each of the numeric variables. Also, remove “NA” ... [Read more...]