Hello World: R + Fortran + OpenMP

Hello World: R + Fortran + OpenMP

Why? I want to fill up a big matrix and I care about speed and to a lesser degree memory efficiency. In practice the matrix will have 4000 rows and K columns where K is the number of observations for which I want to run my predictive model. For this exercise I will keep K to just 500 because my R approach eats a ton of memory. For this simple exercise, I will \(A_{ik} = 1 / (1 + exp(i^2 + i^3 + k^2 + k^3))\) in practice the operation that I need to do is much more complicated which will make the difference is run time even bigger.
Send emails from R with mailgun

Send emails from R with mailgun

Why? Until now I’ve been sending emails with R using my Gmail account. This works, but configuring mailR for the first time is always a pain. A few days ago @marked told me about mailgun and how to use it. The great thing is that you only need httr to use it. How? Using @marked as my base, I created a tiny R package to make using mailgun even easier:
Watson Conversation + R

Watson Conversation + R

Update 10/20/2018: IBM changed something on their api that broke my package. I might try to fix this at some point, for now you can take a look at the video bellow. I just discovered IBM’s Watson conversation, and this free online course shows you how to build your first chatbot. Alas, the course did not cover how to use the API with R. I think chatbots can be very useful when creating shiny apps.
YOURLS API with R

YOURLS API with R

Goal: Create multiple, and trackable, short URLs that point to the same place Tools: YOURLS, R Steps: Installing YOURLS is very easy, particularly if you do it with docker. A container for the database: docker run --name yourlsmysql -e MYSQL_ROOT_PASSWORD=mysecretpassword -d mysql A container for YOURLS: docker run --name yourls -d \ -e YOURL_USER='admin' \ -e YOURL_PASSWORD='mysecretpassword' \ -e YOURLS_SITE='http://sh.tld' \ --link yourlsmysql:mysql bios/docker-yourls To use the web-interface, you need to go to your site.