Blog Archives

Discontinuing maintenance of jug

January 7, 2018
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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...

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Free simmer hexagon stickers!

August 21, 2017
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Free simmer hexagon stickers!

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.

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Extensions for simmer

January 12, 2017
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Extensions for simmer

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...

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simmer v3.5.0 released on CRAN

October 27, 2016
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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...

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Introducing artyfarty: a theming package for ggplot2

October 5, 2016
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Introducing artyfarty: a theming package for ggplot2

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...

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Simulating Continuous-Time Markov Chains with simmer (part 2)

April 25, 2016
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Simulating Continuous-Time Markov Chains with simmer (part 2)

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 gas station following a Poisson process with a...

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Simulating Continuous-Time Markov Chains with simmer (part 1)

April 15, 2016
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Simulating Continuous-Time Markov Chains with simmer (part 1)

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 simmer with a simple Continuous-Time Markov Chain (CTMC) problem as...

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Simulating queueing systems with simmer

April 11, 2016
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Simulating queueing systems with simmer

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 for a bit and see how this package can be used...

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simmer v3.1.1 released on CRAN

December 24, 2015
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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() command was introduced. This allows ordering a resource queue based on the...

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Making an R based ML model accessible through a simple API

November 24, 2015
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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 you don’t want a direct GUI for a ML model...

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