I am doing a discrete choice experiment design for a project that we are just starting. The idea is to present screenshots of various app’s in an app store and ask the participants to pick one. For this, we need screenshots of app’s with key variables changed. The problem is that, unless you are careful…
Tonight I finally finished Last Night on Earth miniatures. I painted the heroes a while back. For a while I was pretty satisfied with the effort. Then I saw Sorastro’s Zombicide painting guide for zombies… Having painted the zombies I thought I was done, but then I saw Consadine’s basic basing guide. Well finally tonight…
My older daughter is old enough to play simple games (Animal upon Animal, Brandon the Brave) but dice throwing has been a problem. A while back I decided to build a dice tower with the dual purpose of both playing games with kids and to make sure the dice is properly random (no cheating).
Plotly presents a visually pleasing way to create 3D plots in R and Python.
Presented our paper in Hawaii, the paper was nominated for best paper. The paper is about add-on content.
In Hawaii for HICSS 50. So far so good. Have seen old friends, met new friends and am enjoying Panoply security competition. Paper being nominated as best paper does not hurt either.
Alright, so far I have been posting about my research and teaching… Now that I have a job that I feel fairly confident about, I think I can actually blog with a bit more liberty. I have been a huge fan of boardgames since I laid my eyes on the “Milyoner” (Turkish knockoff of monopoly)….
I use AWS to run the various scripts used in data collection. I have been paying about $20 each month for a t1 micro instance since my free tier and academic credits ran out. That is quite a price to pay for 1 core and about 600MB ram. Maybe AWS is not the best option…
A few months ago I made a presentation on Tensor Flow for MBA students. The challenge was to simplify the technical underpinnings of the technology sufficiently while preserving a semblance of what it was good for. One particular challenge was visualizing the technology. Showing python code and output was out of the question and at…
I often use data from various sources and sometimes have to get creative about transforming the data into a format that I can use easily. So far I have done this mainly with R (and with Python from time to time). The other day, Dr. Mazzolla pointed to OpenRefine, an application for data clean-up and…
When I teach R, I always caution the audiences about the quirks of R programming. It is very typical for someone with a background in Java or Python to write code in R that will take forever to execute (like I used to do, and sometimes still do). I warn the students about loops and…
I will be presenting our paper, “Surviving and Thriving in Online Labor Markets” this weekend at WISE 2015. Our study aims to uncover the dynamics shaping the online labor markets (freelancer.com, upwork.com, elance.com …), with a focus on the role of country development level on the IT service providers’ ability to survive and earn a…
Google open sourced TensorFlow (TF), a distributed machine learning library, in November. The basic idea is that, you build your ML process into a graph and let TF handle the running and distribution of the work between cores. Be it cores in your CPU or GPU, TF has you covered. The dataflow graph works much…
I am currently developing a tutorial for EMBA students for IBM’s Watson Explorer. Having just recently finished content development for R workshop for MSBA, I must say it is a pretty interesting experience. On the one hand you have R, a complex but powerful tool that is designed to lift (almost) any kind of analytics…
I have been working on the upcoming R workshop for a few weeks now. Finally I am ready to publish part of the material in the spirit of open source, so that others can benefit from, and improve upon my material. I uploaded all the materials to my github repository. There are a few documents…
I am preparing presentations for the upcoming R workshop. That means I have to find a way to integrate R code and results into my presentations. Now I know there are a number of ways to achieve this, but I like beamer for presentations and R for analysis. Now thanks to Knitr, I can bring…
I am working on a workshop for Business Analytics masters students. Part of the demos I intend to use are geographical visualizations. I am using rworldmap package to achieve these. Let us say you have geographical data in a data.frame such as country, with country identifiers stored in “ip_iso2” column in ISO2 format and the…
EDIT: I CHANGED THE SERVICE PROVIDER FOR THE BLOG AND THE CODE BLOCK BELOW GOT MESSED UP. ALL SLASHES WERE GONE. I TRIED TO FIX IT MANUALLY. BEWARE I did my proposal yesterday and it went well 😀 I used beamer to prepare my slide deck and was very pleased with how easy it was…
I was pleasantly surprised to find out that Arizona State University was a member of AWS educate, more so since my year of free trial ran out last month and I just payed my first bill for the Amazon instance I use for data collection. Amazon Web Services provides an easy to deploy, easy to…
I use markdown in my analysis reports and for my research log. When I was thinking of putting up a more official looking public profile page, I found myself thinking of using markdown to create my profile page on ASU web site. While Markdown is convenient in generating HTML, it is not really suited for…
PLM package is pretty decent for traditional econometric models, yet when it comes to datasets I have to deal with everyday it can be pretty inefficient. If only we had a version of within transformation that would work with multiple clustering variables… Actually, we have it in the form of felm package for R from…
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