A while back I visited Artistes & Robots in Paris. Part of the exhibition was on the origins of computer-based art. Nowadays this is referred to as generative art, where computers generate artwork according to rules specified by the programmer. I wanted to emulate some of the early generative artwork I ...

The European tennis season is in full swing, with Roland Garros starting today and Wimbledon taking place in a few weeks. For a sports buff like me, it is the essence of summer (together with the Tour de France). Time to dive into some tennis data. As a follower of ...

If you are a full time data science practitioner and have passed through the stages of starting out with the… Read more RStudio in Docker – now share your R code effortlessly!

Are you an R-programmer or Datascience enthusiast looking for a break in the datascience field? If so, my latest book “Data Science Jobs – land a lucrative job in 90 days” will help you find one quickly. [Author’s note – The ebook is FREE ONLY until midnight this Sunday (May 26th). So ...

Introduction As pointed out by a recent read the R source post on the R hub’s website, reading the actual code, not just the documentation is a great way to learn more about programming and implementation details. But there is one more activity to get even more hands-on experience ...

In a recent post I have shown that we can build linear combinations of model parameters (see here ). For example, if we have two parameter estimates, say Q and W, with standard errors respectively equal to \(\sigma_Q\) and \(\sigma_W\), we can build...

Last winter, I attended a holiday party at a “paint-and-sip” venue. For those unfamiliar, “paint-and-sip” is a semi-trendy cottage industry offering evenings of music, wine, and a guided painting activity. For example, my group painted sasquatch on a snowy winter’s eve: As often happens, this completely unrelated thing set ...

In a recent post I have shown that we can build linear combinations of model parameters (see here ). For example, if we have two parameter estimates, say Q and W, with standard errors respectively equal to \(\sigma_Q\) and \(\sigma_W\), we can build a linear combination as follows: \[Z = ...

Using R and H2O Isolation Forest to predict car battery failures. Carlos Kassab 2019-May-24 This is a study about what might be if car makers start using machine learning in our cars to predict falures. # Loading librariessuppressWarnings( suppressMessages( library( h2o ) ) ) suppressWarnings( suppressMessages( library( data.table ) ) )suppressWarnings( suppressMessages( library( ...

Random Autocorrelation Sequences R version What is an autocorrelation sequence? Autocorrelation sequences (ACSs) are super common when doing anything in probability and statistics. Autocorrelation is a sequence of measurements of how similar a sequence is to it self. In math the autocorrelation sequence r[k] is r[k] = E[x[...

Our publisher, Manning, is running a Memorial Day sale this weekend (May 24-27, 2019), with a new offer every day. Fri: Half off all eBooks Sat: Half off all MEAPs Sun: Half off all pBooks and liveVideos Mon: Half off everything The discount code is: wm052419au. Many great opportunities to ...

On June the 6th, 2019, Rstudio is partnering with ThinkR to offer you a one day event around “R in production”. See you in Paris! If you’re an experienced developer or a decision-maker looking to learn more about what R and RStudio have to offer, then this event made is ...

Yield curve predictions are hitting the headlines again here, here, and here, though they’re not quite front page. The alarm bells are ringing since the probability of a recession appears to have increased meaningfully in the past few months. We loo...

Yield curve predictions are hitting the headlines again here, here, and here, though they’re not quite front page. The alarm bells are ringing since the probability of a recession appears to have increased meaningfully in the past few months. We look at the data to try to infer whether ...

ggiraph 0.6.1 has evolved, this post presents work that has been done recently. ggiraph, what is it? The ggiraph package lets you work with ggplot and produce interactive graphics. The number of features is low and ggiraph usage is simple. The three features to be aware of are: ability to animate ...

Before moving to cross-validation, it was natural to say “I will burn 50% (say) of my data to train a model, and then use the remaining to fit the model”. For instance, we can use training data for variable selection (e.g. using some stepwise procedure in a logistic regression), and ...