Publications by Sam Weiss
Sampling Arbitrary data
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. This post uses quantile random forests to simulate an arbitrary dataset.MCMC Sampling:MCMC s...
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Are Turbocharged Engines More Fuel Efficient?
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 keeping all other variables constant. However, this assumption that we can hold constant other vari...
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Diabetes Drug Switching: Why do people switch from one Drug to another?
Related To leave a comment for the author, please follow the link and comment on their blog: sweissblaug. 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...
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When the Predictions are more accurate than the Response
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 multiple topics discussed. For Example; ...
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Economist Liquidity Index
IntroductionA typical article that discusses economics is awash with words that allude economics connection with water or a liquid. For Example: Markets get saturated when a competing country dumps its products on them Stock prices can get frothy and might develop into a bubble A credit squeeze will dampen expectations and sink prices People ofte...
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Dynamic Networks: Visualizing Arms Trades Over Time
I previously made some network graphs of Middle East country relationships here using Slate’s Middle East Friendship Chart. I was thinking of a way to visualize these relationships (and possibly other ones) with more rule based and objective measure over time. What kind of public dataset could show countries relationships accurately?I used w...
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