Hamiltonian tails
“We demonstrate HMC’s sensitivity to these parameters by sampling from a bivariate Gaussian with correlation coefficient 0.99. We consider three settings (ε,L) = {(0.16; 40); (0.16; 50); (0.15; 50)}” Ziyu...continue reading.
Category: R
Is GINA really about to die?!?
Introduction During a recent negotiation of an informed consent form for use in a clinical trial, the opposing lawyer and I skirmished over the applicability of the Genetic Information Nondiscrimination...continue reading.
Using Machine Learning for Causal Inference
Machine Learning (ML) is still an underdog in the field of economics. However, it gets more and more recognition in the recent years. One reason for being an underdog is,...continue reading.
Variational Gaussian Mixtures for Face Detection
Mixture model A Gaussian mixture model is a probabilistic way of representing subpopulations within an overall population. We only observe the data, not the subpopulation from which observation belongs. We...continue reading.
Finalfit now includes bootstrap simulation for model prediction
If your new to modelling in R and don’t know what this title means, you definitely want to look into doing it. I’ve always been a fan of converting model...continue reading.
Coloured output in the R console
Just a little fun today… the R console isn’t the most interesting of things… text is typically either black or red (assuming default settings in RStudio). There’s a package though...continue reading.
Cone Plots in Plotly with Python
Cone plots (also known as 3-D quiver plots) represent vector fields defined in some region of the 3-D space. A vector field associates to each point of coordinates (x, y,...continue reading.
Cone Plots in Plotly with Python
Cone plots (also known as 3-D quiver plots) represent vector fields defined in some region of the 3-D space. A vector field associates to each point of coordinates (x, y,...continue reading.
rOpenSci’s drake package
If you don’t know rOpenSci, then I recommend checking them out. They write a lot of really good packages for R. A relatively new seems to be drake. I’ve not...continue reading.
A Comparative Review of the R Commander GUI for R
Introduction The R Commander is a free and open source user interface for the R software, one that focuses on helping users learn R commands by point-and-clicking their way through analyses. The R...continue reading.
Writing Pipe-friendly Functions
Pipes have been a fundamental aspect of computer programming for many decades. In short, the semantics of pipes can be thought of as taking the output from the left-hand side...continue reading.
a thread to bin them all [puzzle]
The most recent riddle on the Riddler consists in finding the shorter sequence of digits (in 0,1,..,9) such that all 10⁴ numbers between 0 (or 0000) and 9,999 can be...continue reading.
seven digit addition
Another quick riddle from the riddler: solve the equation EXMREEK + EHKREKK = ?K?H?X?E which involves every digit between 0 and 9. While the puzzle can be unravelled by considering...continue reading.
Weighting tricks for machine learning with Icarus – Part 1
Calibration in survey sampling is a wonderful tool, and today I want to show you how we can use it in some Machine Learning applications, using the R package Icarus....continue reading.
R null values: NULL, NA, NaN, Inf
R language supports several null-able values and it is relatively important to understand how these values behave, when making data pre-processing and data munging. In general, R supports: NULL NA...continue reading.
Rough looking figures from R
A recent blog post regarding data visualization had some barplots I liked the look of (aesthetically…for research purposes, they wouldn’t be suitable). They look as if they’ve be coloured in...continue reading.
Local Goodness-of-Fit Plots / Wangkardu Explanations – a new DALEX companion
Facebook Twitter Google+ LinkedIn The next DALEX workshop will take place in 4 days at UseR. In the meantime I am working on a new explainer for a single observation. Something...continue reading.
Marginal Effects for Regression Models in R #rstats #dataviz
Regression coefficients are typically presented as tables that are easy to understand. Sometimes, estimates are difficult to interpret. This is especially true for interaction or transformed terms (quadratic or cubic...continue reading.
A Comparative Review of the Rattle GUI for R
Introduction Rattle is a popular free and open source Graphical User Interface (GUI) for the R software, one that focuses on beginners looking to point-and-click their way through data mining tasks. Such tasks...continue reading.
