In previous versions of FSA, growthModelSim() was used to produce a scatterplot of length-age data with a von Bertalanffy model superimposed where the parameters of the model were linked to slider bars that allowed the model to be dynamically changed … Continue reading → [Read more...]

In Part 3a I have introduced the plotting system ggplot2. I talked about its concept and syntax with some detail, and then created a few general plots, using the weather data set we've been working with in this series of tutorials. My goal was to show ... [Read more...]

The current release of dplyr (v 0.4.1) offers lot more flexibility regarding usage of important verbs in non-interactive mode. In this post, I'm exploring different possible use-cases.group_by_, select_, rename_:For group_by_, select_ and rename_,... [Read more...]

Utilizando dados do twitter, sua API e o R, resolvi estimar ideologia de políticos importantes no cenário nacional.A ideia é  calcular "Pontos ideais" levando em consideração os seguidores das contas do twitter de cada Político.Estimar "Ideal Points" não é uma ideia nova e a interpretaçã... [Read more...]

I’ve updated the directions as to how to build 64-bit R for Windows linking to OpenBLAS, as the entire R build process for Windows will change for R version 3.2 and subsequent. I’ve turned it into a static page, instead of a post, in case the build process changes ... [Read more...]

Since we started having a beta version of geomorph on GitHub, we understand that installation has become a little bit more complex. We were also aware of the issues for Mac Snow Leopard users.I have written a detailed summary of how to install geomorph... [Read more...]

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by Bob Muenchen As the R programming environment has grown in capability and popularity, so have the number of organizations planning to migrate to it from proprietary tools. I’ve helped members of various organizations transition from SAS, SPSS and/or Stata to R (see Workshop … Continue reading → [Read more...]

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It's hard to overstate the role of open-source software in the data science revolution. Tools like Hadoop, Spark, R, and Python are essential parts of the modern data science toolkit. These tools are likewise part of the solutions built by the Consulting Services group at Revolution Analytics. Our VP of ... [Read more...]

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  F# made pipes popular among data scientists, and the magrittr package brought pipes to R. For example, with magrittr, you could write: [crayon-5532c01154e7a698823689/] instead of [crayon-5532c01154e80418780039/] For example: [crayon-5532c01154e85653101897/] becomes: [crayon-5532c01154e89139820003/] or even (to take it to the extreme): [crayon-5532c01154... [Read more...]

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When you need to do web scraping, you would normally make use of Hadley Wickham’s rvest package. This package provides an easy to use, out of the box solution to fetch the html code that generates a webpage. However, when the website or webpage makes use of JavaScript to ... [Read more...]

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While browsing through the internet I ran into the medicines under evaluation page of the European Medicines Agency. There was a .pdf for each month and I thought it would be interesting to look if I could analyze those data. Each .pdf contains various... [Read more...]

Today, 3/14/2015, is Pi Day (see http://piday.org). In honor of Pi Day, I threw together a little R code on Github, which discusses pi, prints it, and creates Julia set (fractal) images based on it: https://github.com/hack-r/Rpiday Happy Pi Day! [Read more...]

A new minor release of littler is available now. It adds or extends a number of things: added support for drat by adding a new example installDrat.r; the install.r, install2.r and check.r scripts now use getOption("repos") to set the default repos; this works well with ... [Read more...]