Monthly Archives: August 2018

More Practical Data Science with R Book News

August 19, 2018
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Some more Practical Data Science with R news. Practical Data Science with R is the book we wish we had when we started in data science. Practical Data Science with R, Second Edition is the revision of that book with the packages we wish had been available at that time (in particular vtreat, cdata, and … Continue reading More...

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Mapping the Prevalence of Alzheimer Disease Mortality in the USA

August 18, 2018
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Mapping the Prevalence of Alzheimer Disease Mortality in the USA

In comparison with other statistical software (e.g., SAS, STATA, and SPSS), R is the best for data visualization. Therefore, in all posts I have written for DataScience+ I take advantage of R and make plots using ggplot2 to visualize all the findings. For example, previously I plotted the percentiles of body mass index in the Related Post Animating the Goals...

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R:case4base – code profiling with base R

August 18, 2018
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R:case4base – code profiling with base R

Introduction In this summertime post in the case4base series, we will look at useful tools in base R, which let us profile our code without any extra packages needed to be installed. We will cover simple and easy to use speed profiling, more complex profiling of performance and memory and, as always, look at alternatives to base R as well,...

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approximative Laplace

August 17, 2018
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approximative Laplace

I came across this question on X validated that wondered about one of our examples in Monte Carlo Statistical Methods. We have included a section on Laplace approximations in the Monte Carlo integration chapter, with a bit of reluctance on my side as this type of integral approximation does not directly connect to Monte Carlo

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Topics and Categories in the Russian Troll Tweets

August 17, 2018
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Topics and Categories in the Russian Troll Tweets

Topics and Categories in the Russian Troll Tweets I decided to return to the analysis I conducted for the IRA tweets dataset. (You can read up on that analysis and R code here.) Specifically, I returned to the LDA results, which looked like they lined up pretty well with the account categories identified by Darren Linvill and...

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A Review of James Picerno’s Quantitative Investment Portfolio Analytics in R

August 17, 2018
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This is a review of James Picerno’s Quantitative Investment Portfolio Analytics in R. Overall, it’s about as fantastic a book … Continue reading →

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How to Create Sankey Diagrams From Tables (Data Frames) Using R

August 17, 2018
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Step 1: Create a Tidy data frame The very first step in creating visualizations is to get the data in a useful format. In the...

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RcppArmadillo 0.9.100.5.0

August 17, 2018
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RcppArmadillo 0.9.100.5.0

A new RcppArmadillo release 0.9.100.5.0, based on the new Armadillo release 9.100.5 from earlier today, is now on CRAN and in Debian. It once again follows our (and Conrad's) bi-monthly release schedule. Conrad started with a new 9.100.* series a fe...

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An R package to create NEWS.md files

August 17, 2018
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An R package to create NEWS.md files

A while back, I started to create an R package that would help me and my collegues at STATWORX with our daily work. After writing the DESCRIPTION file, I did not want to do this ever again. I found the desc package which let's you parse, manipulate and reformat this file via some functions and ergo a script. If...

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Many reports from 1 RMarkdown file

August 17, 2018
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I was at the EdinbR talk this week by the RStudio community lead – Curtis Kephart. It was really interesting, but I disagree with his suggestion to point and click different parameters when… Continue reading →

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