Articles by JottR on R
NYC R Meetup: Slides on Future
future 1.20.1 – The Future Just Got a Bit Brighter
future 1.20.1 is on CRAN. It adds some new features, deprecates old and unwanted behaviors, adds a couple of vignettes, and fixes a few bugs.
Interactive debugging
First out among the new features, and a long-running feature request, is the ad... [Read more...]
parallelly, future – Cleaning Up Around the House
parallelly adverb
par·al·lel·ly | \ ˈpa-rə-le(l)li \
Definition: in a parallel manner
future noun
fu·ture | \ ˈfyü-chər \
Definition: existing or occurring at a later time
I’ve cleaned up around the house - with the recent releas... [Read more...]
Trust the Future
Each time we use R to analyze data, we rely on the assumption that functions used produce correct results. If we can’t make this assumption, we have to spend a lot of time validating every nitty detail. Luckily, we don’t have to do ...
future 1.19.1 – Making Sure Proper Random Numbers are Produced in Parallel Processing
Parallel ‘Digital Rain’ by Jahobr
After two-and-a-half months, future 1.19.1 is now on CRAN. As usual, there are some bug fixes and minor improvements here and there (NEWS), including things needed by the next version of furrr. For ... [Read more...]
future 1.19.1 – Making Sure Proper Random Numbers are Produced in Parallel Processing
Parallel ‘Digital Rain’ by Jahobr
After two-and-a-half months, future 1.19.1 is now on CRAN. As usual, there are some bug fixes and minor improvements here and there (NEWS), including things needed by the next version of furrr. For ... [Read more...]
Detect When the Random Number Generator Was Used
If you ever need to figure out if a function call in R generated a random number or not, here is a simple trick that you can use in an interactive R session. Add the following to your ~/.Rprofile(*):
if (interactive()) {
invisible(addTaskCallba... [Read more...]
future and future.apply – Some Recent Improvements
There are new versions of future and future.apply - your friends in the parallelization business - on CRAN. These updates are mostly maintenance updates with bug fixes, some improvements, and preparations for upcoming changes. It’s been some time since I blogged about these packages, so here is the ... [Read more...]
e-Rum 2020 Slides on Progressr
Source: Wiktionary.org
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rstudio::conf 2020 Slides on Futures
future 1.15.0 – Lazy Futures are Now Launched if Queried
No dogs were harmed while making this release
future 1.15.0 is now on CRAN, accompanied by a recent, related update of future.callr 0.5.0. The main update is a change to the Future API:
resolved() will now also launch lazy futures
Although this change does not look much to the world, I’... [Read more...]
useR! 2019 Slides on Futures
Below are the slides for my Future: Simple Parallel and Distributed Processing in R that I presented at the useR! 2019 conference in Toulouse, France on July 9-12, 2019.
My talk (25 slides; ~15+3 minutes):
Title: Future: Simple Parallel and Dist...
startup – run R startup files once per hour, day, week, …
New release: startup 0.12.0 is now on CRAN. This version introduces support for processing some of the R startup files with a certain frequency, e.g. once per day, once per week, or once per month. See below for two examples.
startup::startup() is cross platform.
The startup package makes it ... [Read more...]
SatRday LA 2019 Slides on Futures
A bit late but here are my slides on Future: Friendly Parallel Processing in R for Everyone that I presented at the satRday LA 2019 conference in Los Angeles, CA, USA on April 6, 2019.
My talk (33 slides; ~45 minutes):
Title: : Friendly Parallel...
SatRday Paris 2019 Slides on Futures
Below are links to my slides from my talk on Future: Friendly Parallel Processing in R for Everyone that I presented last month at the satRday Paris 2019 conference in Paris, France (February 23, 2019).
My talk (32 slides; ~40 minutes):
Title: F...
Parallelize a For-Loop by Rewriting it as an Lapply Call
A commonly asked question in the R community is:
How can I parallelize the following for-loop?
The answer almost always involves rewriting the for (...) { ... } loop into something that looks like a y
Maintenance Updates of Future Backends and doFuture
New versions of the following future backends are available on CRAN:
future.callr - parallelization via callr, i.e. on the local machine
future.batchtools - parallelization via batchtools, i.e. on a compute cluster with job schedulers (SLURM, SGE, Torque/PBS, etc.) but also on the local machine
future.... [Read more...]
future 1.9.0 – Output from The Future
future 1.9.0 - Unified Parallel and Distributed Processing in R for Everyone - is on CRAN. This is a milestone release:
Standard output is now relayed from futures back to the master R session -
regardless of where the futures are processed!
Disclaimer: A future’s output is relayed only after ...
R.devices – Into the Void
R.devices 2.16.0 - Unified Handling of Graphics Devices - is on CRAN. With this release, you can now easily suppress unwanted graphics, e.g. graphics produced by one of those do-everything-in-one-call functions that we all bump into once in a while. To suppress graphics, the R.devices package provides graphics ... [Read more...]
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