Blog Archives

DIY – cheat sheets

March 20, 2017
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DIY – cheat sheets

I found recently, that in addition to a great list of cheatsheets designed by RStudio, one can also download a template for new cheatsheets from RStudio Cheat Sheets webpage. With this template you can design your own cheatsheet, and submit it to the collection of Contributed Cheatsheets (Garrett Grolemund will help to improve the submission … Czytaj...

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Is it a job offer for a Data Scientist?

January 10, 2017
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Is it a job offer for a Data Scientist?

TL;DR Konrad Więcko and Krzysztof Słomczyński (with tiny help from my side) have created a system that is tracing what skills are currently in demand among job offers for data scientists in Poland. What skills, how frequent and how the demand is changing over time. The full description how this was done. static, +shiny. Here: … Czytaj...

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How to weigh a dog with a ruler? (looking for translators)

December 12, 2016
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How to weigh a dog with a ruler? (looking for translators)

We are working on a series of comic books that introduce statistical thinking and could be used as activity booklets in primary schools. Stories are built around adventures of siblings: Beta (skilled mathematician) and Bit (data hacker). What is the connection between these comic books and R? All plots are created with ggplot2. The first … Czytaj...

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PISA 2015 – how to read/process/plot the data with R

December 7, 2016
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PISA 2015 – how to read/process/plot the data with R

Yesterday OECD has published results and data from PISA 2015 study (Programme for International Student Assessment). It’s a very cool study – over 500 000 pupils (15-years old) are examined every 3 years. Raw data is publicly available and one can easily access detailed information about pupil’s academic performance and detailed data from surveys for … Czytaj...

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ggmail + forecast = how many emails I will get tomorrow?

October 31, 2016
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ggmail + forecast = how many emails I will get tomorrow?

During the eRum 2016, Adam Zagdański gave a very good tutorial about time series modeling. Among other things I’ve learned that the forecast package (created by Rob Hyndman) got cool new plots based on the ggplot2 package. Let’s use it to play with mailbox statistics for my gmail account! 1. Get the data Follow this … Czytaj...

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Program of the european R users meeting [only 7 days to go]

October 3, 2016
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Program of the european R users meeting [only 7 days to go]

The european R users meeting is going to start in just 7 days. We expect over 250 participants, 10 invited talks, 47 regular talks, 13 lightning talks and 12 posters. In order to handle that much content we scheduled 18 sessions . Find the program of the conference here or here. In the … Czytaj...

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MinechaRts #1 (Minecraft + R + Edgar Anderson’s Iris Data)

September 5, 2016
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MinechaRts #1 (Minecraft + R + Edgar Anderson’s Iris Data)

How to use R to draw 3D scatterplots in Minecraft? Let’s see. Minecraft is a game about placing blocks and going on adventures (source). Blocks are usually placed by players but there are add-ons that allow to add/modify/remove blocks through external API. And this feature is being used in educational materials that show how to … Czytaj...

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A link that can tell more than dozens of lines of R code – what’s new in archivist?

July 28, 2016
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A link that can tell more than dozens of lines of R code – what’s new in archivist?

Can you spot the difference between this plot: And this one: You are right! The latter has an embedded piece of R code. What for? It’s a call to a function aread from archivist – a package that manages external copies of R objects. This piece of code was added by the function addHooksToPrint(), that … Czytaj...

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Shiny + archivist = reproducible interactive exploration

June 26, 2016
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Shiny + archivist = reproducible interactive exploration

Shiny is a great tool for interactive exploration (and not only for that). But, due to its architecture, all objects/results that are generated are stored in a separate R process so you cannot access them easily from your R console. In some cases you may wish to retrieve a model or a plot that you … Czytaj dalej...

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eRum 2016 — last days of call for papers

June 9, 2016
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eRum 2016 —  last days of call for papers

Only 6 days left to the end of the call for papers for eRum 2016! Register and submit your talk proposal at www.erum.ue.poznan.pl. European R users meeting will be a great place to learn and share ideas on R. Moreover, we have already confirmed the following invited talks: Browse Till You Die: Scalable Hierarchical Bayesian … Czytaj dalej...

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