how I created my blog using Lanyon, Poole and Jekyll
In my first blog post, I’ll explain how I created my blog. I don’t have any knowledge of building web sites and somehow I thought it will be difficult. However,...continue reading.
Monthly Archive: January 2016
Pitfall of XML package: issues specific to cp932 locale, Japanese Shift-JIS, on Windows
CRAN package XML has something wrong at parsing html pages encoded in cp932 (shift-jis). In this report, I will show these issues and also their solutions which is workable at...continue reading.
R Graph Objects: igraph vs. network
While working on new graph functions for my package toaster I had to pick from the R packages that represent graphs. The choice was between network and graph objects from the network and igraph correspondingly – …continue reading.
Delaware versus Chesapeake revisited
In this earlier post, I analyzed tidal water surface elevation data from the NOAA PORTS system from both the Delaware Estuary and the Chesapeake Bay, showing how the two systems...continue reading.
Need any more reason to love R-Shiny? Here: you can even use Shiny to create simple games!
TL;DR Click here to play a puzzle game written entirely in Shiny (source code). Anyone who reads my blog posts knows by now that I’m very enthusiastic about Shiny (the...continue reading.
Do basic R operations much faster in bash [Slightly off-topic]
R is great, and you can do a LOT OF stuff with it.However, sometimes you want to do really basic stuff with huge or a lot of files. At work,...continue reading.
More Fun with Choropleth Maps
I have a guest post up today at Ari Lamstein’s blog where I show some more fun things that can be done with the Religious Congregations and Membership Study at...continue reading.
Shiny 0.13.0
Shiny 0.13.0 is now available on CRAN! This release has some of the most exciting features we’ve shipped since the first version of Shiny. Highlights include: Shiny Gadgets HTML templates...continue reading.
Water World
I live in Utah, an extremely dry state. Like much of the western United States, Utah is experiencing water stress from increasing demand, episodes of drought, and conflict over water...continue reading.
Water World
I live in Utah, an extremely dry state. Like much of the western United States, Utah is experiencing water stress from increasing demand, episodes of drought, and conflict over water...continue reading.
Population Model Revisited
In a previous post I showed an animated age structure diagram depicting output from a simple population model written in Excel. Here is another version of that model written in...continue reading.
Automating R exercises and exams using the exams package
It’s a pain to design statistics exercises each semester, and because students from previous share old exercises with the new incoming students, it’s hard to design simple exercises that students...continue reading.
ggtern 2.0 now available
Recently ggplot2 received a severe makeover by releasing version 2.0, and in the spirit of improvement, I thought ggtern should also get an overhaul, so after a few-hundred hours of...continue reading.
First step on GIS with R
The PM 2.5 checker written by R has been working nicely for me. I put a shortcut icon of this small script on my desktop PC, to check the air...continue reading.
RcppParallel: Getting R and C++ to work (some more) in parallel
(Post by Dirk Eddelbuettel and JJ Allaire) A common theme over the last few decades was that we could afford to simply sit back and let computer (hardware) engineers take...continue reading.
Getting Started with Data Science: Storytelling with Data
Earlier this month, IBM Press and Pearson have published my book titled: Getting Started with Data Science: Making Sense of Data with Analytics. You can download sample pages, including a...continue reading.
Calculate the odd of winning Powerball in R
This Wednesday’s Powerball grand prize already climbed up to $1.5 BILLION. If you choose to cash out, it would be $930 million. And it keeps increasing… So, what’s the odd...continue reading.
Health Care Indicators in Utah Counties
The state of Utah (my adopted home) has an Open Data Catalog with lots of interesting data sets, including a collection of health care indicators from 2014 for the 29...continue reading.
High Flows in Lower Columbia River near Portland, OR
After I completed the animated tidal water surface elevation plots for the Delaware Estuary, I looked for other systems with a good set of tidal observation stations. The Lower Columbia...continue reading.
Animated 3D Plot of Ammonia Toxics Criteria
In 2013, EPA published final national recommended water quality criteria for the protection of aquatic life from the toxic effects of ammonia in freshwater.http://www.epa.gov/wqc/aquatic-life-criteria-ammoniaThese criteria are a function of water …continue reading.
