Warning: this post contains profanity...arguably excessive amounts of it.  If you are a humorless no-fun, you are recommended to proceed no further. Seriously though, the title is quite descriptive of the content of this post.  If you are offended by the use of such language, or if your boss ... [Read more...]

Have you ever used a markdown file to create an html file? Have you ever wanted to quickly format the subsequent html file to add some color or other aspects? If your answer is yes to both of those questions, this package may be of interest to you. ... [Read more...]

I recently came to the conclusion that I need a more meaningful way to track my productivity than the spreadsheet I am currently using, so my next few posts are going to be about building a system in R to … Continue reading → [Read more...]

Will you have that segmentation with one or two modes?The data matrix for market segmentation comes to us with two modes, the rows are consumers and the columns are variables. Clustering uses all the columns to transform the two-mode data matrix (row a... [Read more...]

Packages vs ProjectTemplate tl;dr Imposing a different structure than R packages for distributing R code is a bad idea, especially now that R package tools have gotten to the point where managing a package has become much easier. ProjectTemplate ?? My last two posts (1, 2) provided an argument and an example ... [Read more...]

by Andrie de Vries In my previous post I wrote about how to identify and visualize package dependencies. Within hours, Duncan Murdoch (member of R-core) identified some discrepancies between my list of dependencies and the visualisation. Since then, I fixed the dispecrancies. In this blog post I attempt to clarify ... [Read more...]

This is the bimonthly R Jobs post (for 2014-07-29), based on the R-bloggers’ sister website: R-users.com. If you are an employer who is looking to hire people from the [Read more...]

The new R Markdown (rmarkdown-package) introduced in Rstudio 0.98.978 provides some neat features by combining the awesome knitr-package and the pandoc-system. The system allows for some neat simplifications of the fast-track-publishing (ftp) idea using so called formats. I've created a new package, the Grmd-package, with an extension to the html_document ... [Read more...]

At the R in Insurance conference Arthur Charpentier gave a great keynote talk on Bayesian modelling in R. Bayes' theorem on conditional probabilities is strikingly simple, yet incredibly thought provoking. Here is an example from Daniel Kahneman to test your intuition. But first I have to start with Bayes' theorem.... [Read more...]

doctors prescribe medications for patients all the time.  all the time.  sometimes the results are beneficial, other times the drug has no discernible effect, but occasionally those substances actually cause harm.  since the drug is alre... [Read more...]

Creating an analysis as a package and vignette Following from my last post, I am going to go step by step through the process I use to generate an analysis as a package vignette. This will be an analysis of the tweets from the 2012 and 2014 ISMB conference (thanks to Neil ... [Read more...]

So the last time that a FRAMA strategy was tried with price crossovers, the problem was that due to counter-trending … Continue reading → [Read more...]

[This article was first published on Yet Another Blog in Statistical Computing » S+/R, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your content on R-bloggers? click here if you have a blog, or here if you don't. library(data.table) library(dplyr) data1 <- fread('/home/liuwensui/Downloads/2008.csv', header = T, sep = ',') dim(data1) # [1] 7009728 29 data2 <- data1 %.% filter(Year = 2008, Month %in% c(1, 2, 3, 4, 5, 6)) %.% select(Year, Month, AirTime) %.% group_by(Year, Month) %.% summarize(avg_time = mean(AirTime, na.rm = TRUE)) %.% arrange(desc(avg_time)) print(data2) # Year Month avg_time # 1 2008 3 106.1939 # 2 2008 2 105.3185 # 3 2008 6 104.7604 # 4 2008 1 104.6181 # 5 2008 5 104.3720 # 6 2008 4 104.2694 To leave a comment for the author, please follow the link and comment on their blog: Yet Another Blog in Statistical Computing » S+/R. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job. Want to share your content on R-bloggers? click here if you have a blog, or here [...] [Read more...]

(This article is adapted to the latest version of rvest package.) In my previous post, I demonstrated how we can scrape online data using existing packages. In this post, I will take it a bit further: I will scrape more information of CRAN packages since each of them also has ... [Read more...]

Data caching is not new. It is often necessary to save intermediate data files when the process of loading and/or manipulating data takes a considerable amount of time. This problem is further complicated when working with dynamic data that changes regularly. In these situations it often sufficient to use ... [Read more...]

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After writing a blog post about the paper “Sustainability and innovation in staple crop production in the US Midwest” I decided to submit a formal comment to the International Journal of Agricultural Sustainability in July 2013, which was published today. As far as I know, Heinemann et al. provided a rebuttal ... [Read more...]

This free, global webinar will provide an introduction to jpmml, the world’s leading open-source PMML scoring engine currently being utilized by companies such as Airbnb to rapidly deploy predictive models into production. Webinar Format: – What is PMML? – Building … Continue reading → [Read more...]

Last week, Eric Chemi and Ariana Giorgi published an interesting article on “The Pay-for-Performance Myth” With all the public chatter about exorbitant executive compensation and income inequality, it’s useful to look at the relationship between chief executive officer pay and corporate performance. Typically, when the subject of their big ... [Read more...]

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