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The purpose of this post is to discuss the methodology of classifying paragraphs of documents, where the document is only assigned one topic. In my usage, a document is an article that is assigned a Section (Business, Economics / Finance, Science, Europe, Middle East, etc). Of course each article can have ... [Read more...]

[This article was first published on sweissblaug, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your content [Read more...]

Introduction:My previous post discussed methods to uncover effects of a particular explanatory variable on a response variable in machine learning models. These work by changing the variable of interest and measure how much the change in output, is kee... [Read more...]

Introduction:Generating data usually requires a variance - covariance matrix and is therefore restricted by using a linear assumption between the variables. However, using a linear assumption between data can miss important non - linear relationships. ... [Read more...]

Machine Learning models generally outperform standard regression models in terms of predictive performance. However, these models tend to be poor in explaining how they achieve a particular result. This post will discuss three methods used to peak insi... [Read more...]

I recently saw Slate.com redid its Mideast Graphic and thought it would be good to redo my previous analysis. From the original slate graphic it's hard to make much sense of what's happening and who's friends with whom.From the graph below we can ... [Read more...]

GithubI've been reading a few books on WW1 and wanted to see a time series plot of battle casualty/pow by country to get a better understanding of how the conflict fits together. I couldn't find any database for military casualties in WW1 but Wikipedia... [Read more...]

Introduction:GithubThe Western Front in World War One is considered a a war of outdated tactics combined with brutal efficiency of technology. And while the war saw the introduction of several innovations (eg. tanks and airplanes) the general routine o... [Read more...]

I'll produce predictions for US car sales by manufacture every month. There are already several blogs that describe the industry and sales that do a great job. Autoblog by the Numbers and Counting Cars are some to mention. Unli... [Read more...]

I've set out to produce monthly forecasts of monthly car sales by brand in the US. So far I've made a SUTSE dynamic linear model (code on Github) and created a Shiny app (http://sweiss.shinyapps.io/carvis/) as a prototype (no predictions... [Read more...]

Slate recently published a great info-graphic about Middle-East Relationships. It shows the relationships (Friend, Enemy, or Complicated) of 13 countries / organizations and the relationships between each pair. One draw back of the chart is that it doe... [Read more...]

A function that will take a String as an input and return the "Did you mean.." or "Showing Results for.." from google.com. Good for misspelled names or locations.Githublibrary(RCurl)didYouMean=function(input){  input=gsub(" ", "+", input)  do... [Read more...]

Check out PDF for Equations And Code to run yourself Introduction: “This Time is different” by Reinhart and Rogoff is an empirical history of financial crises and panics.  It describes many economic events such as; inflation, bubbles, and defaults. The theme that ties these events together is the idea that ... [Read more...]

Check out PDF for Equations And Code to run yourself Introduction: “This Time is different” by Reinhart and Rogoff is an empirical history of financial crises and panics.  It describes many economic events such as; inflation, bubbles, and defaults. The theme that ties these events together is the idea that ... [Read more...]