I’m starting off 2018 with dropping my involvement with jug. The reason for this being that I simply cannot find the time or interest anymore to maintain the code. All of the open-source efforts that I started always had to do with a concrete need t... [Read more...]

Do you want to get your own simmer hexagon sticker? Just fill in this form and get one send to you for free. Check out r-simmer.org or CRAN for more information on simmer, a discrete-event simulation package for R. [Read more...]

A new version of the Discrete-Event Simulator for R was released a few days ago on CRAN. The most interesting new feature is the implementation of the subsetting operators [ and [[ for trajectory objects. Basically, think about trajectories as lists of... [Read more...]

We are proud to present simmer 3.5.0, a new release on CRAN of the Discrete-Event Simulator for R with a bunch of exciting features: Simpler logging. So far, if we wanted arrivals to print something into the console, we had, for instance, to make a... [Read more...]

In the last few years, I’ve been using ggplot2 quite a lot. While the ggplot2 default theme is quite slick, I started tweaking the theme to fit my own taste and/or that of the target audience. artyfarty is a collection of a few themes that I have us... [Read more...]

In part one, we simulated a simple CTMC. Now, let us complicate things a bit. Remember the example problem there: A gas station has a single pump and no space for vehicles to wait (if a vehicle arrives and the pump is not available, it leaves). Vehicles arrive to the ... [Read more...]

In the previous post, we gave you some insights about the simulation of simple birth-death processes with simmer. The extension of such a methodology for more complex queueing networks is immediate and was left as an exercise for the reader. Similarly, today we are going to explore more features of ... [Read more...]

We are very pleased to announce that a new release of simmer, the Discrete-Event Simulator for R, is on CRAN. There are quite a few changes and fixes, with the support of preemption as a star new feature. Check out the complete set of release notes here. Let’s simmer ... [Read more...]

Last week the latest version of simmer was released on CRAN: v3.1.1. This version allows adding attributes to arrivals (and basing decisions on their values). Also, the rollback activity was introduced, enabling you to roll back a trajectory with n steps. In addition, a new priority param for the seize() ... [Read more...]

Building an accurate machine learning (ML) model is a feat on its own. But once you’re there, you still need to find a way to make the model accessible to users. If you want to create a GUI for it, the obvious approach is going after shiny. However, often ... [Read more...]

I’m very pleased to announce the first CRAN release of simmer. (https://cran.rstudio.com/web/packages/simmer/). This release has been realised thanks to the efforts made by Iñaki. To reiterate a bit, simmer is a discrete-event simulation (DES) package for R. It is the first R ... [Read more...]

Jug is a package to allow you to easily create web APIs based on your R codestack. Documentation and examples can be found at: http://bart6114.github.io/jug/ To get started; give the CRUD-like example a try. First clone the example respository. ... [Read more...]

Jug stands for Just Unified Galloping. Okay, okay, it’s just a play on words coming from a Flask (Python) background. Jug is my attempt to create a simple small web framework that allows you to turn your (existing) R functions into an API. Having the wonderful httpuv package at ... [Read more...]

dimple is a simple-to-use charting API powered by D3.js. Making use of the nice htmlwidgets package it only took a minimum amount of coding to make the dimple library available from R. You can find the dimple R package at github.com/Bart6114/dimple a... [Read more...]

I wanted to create a nice visualization from a survey data set. I quickly stumbled upon the likert package (go check it out). I did however have some trouble getting it to work the way I wanted. Therefore I made a quick implementation of my own that y... [Read more...]

Version 0.1 of infuser was just released on CRAN. infuser is a very basic templating engine. It allows you to replace parameters in character strings or text files with a given specified value. I would often include some SQL code in my R scripts so t... [Read more...]

I’ve always liked the jQuery Sparklines library and today I had a use case for implementing these in one of my Rmarkdown reports. While it wouldn’t be too difficult to staticly include a javascript based chart, ideally I would simply want to dynamically generate the sparkline using values ... [Read more...]

For the newcomers; scheduleR is a framework to deploy/schedule R tasks, reports and Shiny apps. The tool has an integrated logging and notification system to ease the maintenance of scheduled R related jobs. After a lot of refactoring the tasks have been separated into tasks (e.g. ETL scripts) ... [Read more...]

This post has been transferred from another blog platform and could have dead links / incorrect lay-out. Please note: the syntax described here is no longer up-to-date, please refer to the readme at simmer’s GitHub page. The simmer package grew out of a personal need for a simple rapid development ... [Read more...]