Blog Archives

simmer 3.8.0

May 7, 2018
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The 3.8.0 release of simmer, the Discrete-Event Simulator for R, hit CRAN almost a week ago, and Windows binaries are already available. This version includes two highly requested new features that justify this second consecutive minor release. Attachment of precomputed data Until v3.7.0, the generator was the only means to attach data to trajectories, and it was primarily… Continuar leyendo simmer 3.8.0...

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simmer 3.7.0

March 3, 2018
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The 3.7.0 release of simmer, the Discrete-Event Simulator for R, is on CRAN. It includes several API improvements and bug fixes. Among the former, the new timeout_from_attribute() activity makes it easier and more efficient the common task of placing a timeout based on a previously set attribute. Another common task is to increment or decrement a given attribute.… Continuar leyendo simmer 3.7.0...

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Documenting R packages: roxygen2 vs. direct Rd input

February 3, 2018
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Documenting R packages: roxygen2 vs. direct Rd input

As the reader may know, R objects are documented in files written in “R documentation” (Rd) format, a simple markup language much of which closely resembles (La)TeX, which can be processed into a variety of formats, including LaTeX, HTML and plain text. This LaTeX-like syntax, combined with the fact that the actual R objects live… Continuar leyendo Documenting R...

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Tidyverse and data.table, sitting side by side… and then base R walks in

January 23, 2018
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Of course, I’m paraphrasing Dirk’s fifteenth post in the rarely rational R rambling series: #15: Tidyverse and data.table, sitting side by side … (Part 1). I very much liked it, because, although I’m a happy tidyverse user, I’m always trying not to be tied into that verse too much by replicating certain tasks with other tools (and languages) as an… Continuar leyendo Tidyverse and...

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simmer.bricks 0.1.0: new add-on for simmer

January 17, 2018
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The new package simmer.bricks has found its way to CRAN. The simmer package provides a rich and flexible API to build discrete-event simulations. However, there are certain recurring patterns that are typed over and over again, higher-level tasks which can be conceptualised in concrete activity sequences. This new package is intended to capture this kind of patterns into usable bricks,… Continuar leyendo simmer.bricks 0.1.0:...

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simmer 3.6.5

January 4, 2018
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The fifth update of the 3.6.x release of simmer, the Discrete-Event Simulator for R, is on CRAN. This release extends the attributes API by allowing users to set/get multiple attributes at once (a pretty straightforward change as well as useful; I don’t know why it didn’t occurred to me before…). Vectors as attributes and other data… Continuar leyendo simmer 3.6.5...

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Visualising SSH attacks with R

November 30, 2017
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Visualising SSH attacks with R

If you have any machine with an SSH server open to the world and you take a look at your logs, you may be alarmed to see so many login attempts from so many unknown IP addresses. DenyHosts is a pretty neat service for Unix-based systems which works in the background reviewing such logs and appending the… Continuar leyendo Visualising SSH...

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simmer 3.6.4

November 7, 2017
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The fourth update of the 3.6.x release of simmer, the Discrete-Event Simulator for R, is on CRAN. This release patches several bugs regarding resource priority and preemption management when seized amounts greater than one were involved. Check the examples available in the corresponding issues on GitHub (#114, #115, #116) to know if you are affected. It can be… Continuar leyendo simmer 3.6.4...

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simmer 3.6.3

July 28, 2017
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The third update of the 3.6.x release of simmer, the Discrete-Event Simulator for R, is on CRAN. First of all and once again, I must thank Duncan Garmonsway (@nacnudus) for writing a new vignette: “The Bank Tutorial: Part II”. Among various fixes and performance improvements, this release provides a way of knowing the progress of a simulation.… Continuar leyendo simmer 3.6.3...

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Programming with dplyr by using dplyr

July 23, 2017
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The title may seem tautological, but since the arrival of dplyr 0.7.x, there have been some efforts at using dplyr without actually using it that I can’t quite understand. The tidyverse has raised passions, for and against it, for some time already. There are excellent alternatives out there, and I myself use them when I find it suitable. But when I choose to… Continuar leyendo Programming with...

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