Price Volatility – Basic Brownian Motion
The Situation You are a consultant who has been hired by a business that sells one commodity product. On December 31st the price is $100 per unit. The business owner...continue reading.
Category: R News
Ordering Categories within ggplot2 Facets
I saw Simon Jackson’s recent blog post regarding ordering categories within facets. He proposed a way of dealing with the problem of ordering variables shared across facets within facets. This...continue reading.
TrelliscopeJS with Plotly
In response to a user’s request and after a short conversation with Carson Sievert (creator / maintainer of the plotly R package), I recently made a small tweak to TrelliscopeJS...continue reading.
TrelliscopeJS with Plotly
In response to a user’s request and after a short conversation with Carson Sievert (creator / maintainer of the plotly R package), I recently made a small tweak to TrelliscopeJS...continue reading.
Start Me Up
The startup package makes it easy to control your R startup processes and to share part of your startup settings with others (e.g. as a public Git repository) while keeping...continue reading.
Inspecting R in GDB (with Python)
Today I spent a few hours debugging a hanging R process that left a zombie sh which so far suggests bug (race condition?) in R’s system2() call. Anyway, it soon turned...continue reading.
Simple Matrix Factorization with TensorFlow
This post aims to illustrate use of TensorFlow framework for implementing a simple Matrix Factorization (MF). MF is one of the widely used recommender systems that is especially exploited when...continue reading.
Work on lists of datasets instead of individual datasets by using functional programming
Analyzing a lot of datasets can be tedious. In my work, I often have to compute descriptive statistics, or plot some graphs for some variables for a lot of datasets....continue reading.
Work on lists of datasets instead of individual datasets by using functional programming
Analyzing a lot of datasets can be tedious. In my work, I often have to compute descriptive statistics, or plot some graphs for some variables for a lot of datasets....continue reading.
Correlation Primer with Aster and R
Calculating correlations is often starting point before more advanced analytical steps take place. Big data (long data) always presents computational challenges of both scale and distributed nature. In turn they...continue reading.
R For Beginners: Basic R Code for Common Statistical Procedures Part I
An R tutorial by D. M. Wiig This section gives examples of code to perform some of the most common elementary statistical procedures. All code segments assume that the package...continue reading.
Automatically generated join-the-dots images
It is interesting to try and figure out what picture emerges from a join-the-dots puzzle (connect-the-dots in some parts of the world). Let’s have a go at some lightweight automatic...continue reading.
Seinfeld Characters – A Post About Nothing
This post is dedicated to my mother – Seinfeld’s greatest fan. Seinfeld is a classic TV sitcom. It featured four main characters surrounded by relatively normal, everyday, run of the...continue reading.
Register today for rstudio::conf 2017!
On the other side of the Holidays are sunny January days in Florida, home of rstudio::conf 2017 and the exclusive Wizarding World of Harry Potter experience reserved for our guests!...continue reading.
Creating figures like the paper ‘Completeness of Digital Accessible Knowledge of Plants of Ghana’ Part 4
This is the fourth part of the of the post where are going to create figure 4 Plot of Inventory Completeness against sample size for grid cells. Part 3 of this series we...continue reading.
(A Very) Experimental Threading in R
I’ve been trying to find a way to introduce threads to R. I guess there can be many reasons to do that, among which I could mention simplified input/output logic,...continue reading.
Estimate Regression with (Type-I) Pareto Response
The Type-I Pareto distribution has a probability function shown as below f(y; a, k) = k * (a ^ k) / (y ^ (k + 1)) In the formulation, the...continue reading.
R Video Tutorial: Basic R Code to Load a Data File and Produce a Histogram
R For Beginners: Some Simple R Code to Load a Data File and Produce a Histogram A tutorial by D. M. Wiig I have found that a good method for learning how to...continue reading.
Visualizing 15k Instagram Posts with TrelliscopeJS
This post shows a simple example of creating an interactive display that allows you to navigate thousands of instagram posts with just a few lines of code using TrelliscopeJS. The...continue reading.
