Reproducible Research – when your results can’t be reproduced?

Reproducible Research – when your results can’t be reproduced?

Even most sophisticated machine learning methods, most beautiful visualisations and perfect datasets can be useless if you do your research carelessly and ignore the context of your code execution. In this article, you will read about a few situations ...

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nanotime 0.1.2

March 28, 2017
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A new minor version of the nanotime package for working with nanosecond timestamps arrived yesterday on CRAN. nanotime uses the RcppCCTZ package for (efficient) high(er) resolution time parsing and formatting up to nanosecond resolution, and the bit6...

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Introducing Boardgame Recommendation website built with Shiny

March 27, 2017
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My family and I love boardgames.  We are also on the lookout for new ones that would fit with the ones we already like to play.  So I decided to create a boardgame recommendation websitehttps://larrydag.shinyapps.io/boardgame_reco/I built it using R.  The recommendation engine uses a very simple collaborative filtering algortihm based on correlation scores from other boardgame players collection...

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Multilabel Classification with mlr

March 27, 2017
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Multilabel classification has lately gained growing interest in the research community. We implemented several methods, which make use of the standardized mlr framework. Every available binary learner can be used for multilabel problem transformation methods. So if you’re interested in using several multilabel algorithms and want to know how to use them in the mlr framework, then this post is...

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Le Monde puzzle [#1000…1025]

March 27, 2017
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Le Monde puzzle [#1000…1025]

Le Monde mathematical puzzle launched a competition to celebrate its 1000th puzzle! A fairly long-term competition as it runs over the 25 coming puzzles (and hence weeks). Starting with puzzle #1001. Here is the 1000th puzzle, not part of the competition: Alice & Bob spend five (identical) vouchers in five different shops, each time buying

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Data science languages score highly in RedMonk rankings

March 27, 2017
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Data science languages score highly in RedMonk rankings

Redmonk have once again updated (a little later than usual) their bi-annual programming language report with their January 2017 rankings. If you haven't come across these rankings before, they are based on GitHub contributions and StackOverflow questions related to around 40 commonly-used programming languages. The raw data (as of January 2017) is shown below — as you might guess...

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All-in on R⁴ : Progress [bars] on first post

March 27, 2017
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@eddelbuettel’s idea is a good one. (it’s a quick read…jump there and come back). I often wait for a complete example or new package announcement to blog something when a briefly explained snippet might have sufficient utility for many R users. Also, tweets are fleeting and twitter could end up on the island of misfit... Continue reading...

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How to Reach More People with your Next Data Science Talk

March 27, 2017
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How to Reach More People with your Next Data Science Talk

Speaking publicly about your data science projects is one of the best things you can do for your portfolio. Writing your presentation will help you refine... The post How to Reach More People with your Next Data Science Talk appeared first on AriLamstein.com.

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Data science for Doctors: Inferential Statistics Exercises (part-3)

March 27, 2017
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Data science for Doctors: Inferential Statistics Exercises (part-3)

Data science enhances people’s decision making. Doctors and researchers are making critical decisions every day. Therefore, it is absolutely necessary for those people to have some basic knowledge of data science. This series aims to help people that are around medical field to enhance their data science skills. We will work with a health related Related exercise sets:

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An Introduction to Stock Market Data Analysis with R (Part 1)

March 27, 2017
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An Introduction to Stock Market Data Analysis with R (Part 1)

This is my first article in a two-part series introducing stock data analysis using R.

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Analyzing Accupedo step count data in R: Part 2 – Adding weather data

March 27, 2017
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Analyzing Accupedo step count data in R: Part 2 – Adding weather data

In my last set of posts, I wrote about analyzing data from the Accupedo step counter app I have on my phone. In this post, I'll talk about some additional analysis I've done by merging the step counter data with weather data from another source.The website www.wunderground.com has freely available weather data available for most parts of the...

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#0: Introducing R^4

March 27, 2017
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So I had been toying with the idea of getting back to the blog and more regularly writing / posting little tips and tricks. I even starting taking some notes but because perfect is always the enemy of the good it never quite materialized. But the rel...

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Introducing brotools

I’m happy to announce my first R package, called brotools. This is a package that contains functions that are specific to my needs but that you might find also useful. I blogged about some of these functions, so if you follow my blog you might already be familiar with some of...

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Fitting Bayesian Linear Mixed Models for continuous and binary data using Stan: A quick tutorial

March 27, 2017
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I want to give a quick tutorial on fitting Linear Mixed Models (hierarchical models) with a full variance-covariance matrix for random effects (what Barr et al 2013 call a maximal model) using Stan. For a longer version of this tutorial, see: Sorensen, Hohenstein, Vasishth, 2016. Prerequisites: You need to have R and preferably RStudio installed;...

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Updated Shiny app

March 26, 2017
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A short post to alert the world that my modest Shiny application, showing Major League Baseball run scoring trends since 1901, has been updated to include the 2016 season. The application can be found here:https://monkmanmh.shinyapps.io/MLBrunscoring_shiny/.In addition to the underlying data, the update removed some of the processing that was happening inside the application, and put it into...

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Le Monde puzzle [#1001]

March 26, 2017
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Le Monde puzzle [#1001]

After a long lag (due to my missing the free copies distributed at Paris-Dauphine!), here is a Sudoku-like Le Monde mathematical puzzle: A grid of size (n,n) holds integer values such that any entry larger than 1 is the sum of one term in the same column and one term in the same row. What

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RcppTOML 0.1.2

March 26, 2017
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A new release of RcppTOML is now on CRAN. This release fixes a few parsing issues for less frequently-used inputs: vectors of boolean or date(time) types, as well as table array input. RcppTOML brings TOML to R. TOML is a file format that is most suitable for configurations, as it is meant to be edited...

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Economics chapter added to “Empirical software engineering using R”

March 26, 2017
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The Economics chapter of my Empirical software engineering book has been added to the draft pdf (download here). This is a slim chapter, it might grow a bit, but I suspect not by a huge amount. Reasons include lots of interesting data being confidential and me not having spent a lot of time on this

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Using R to study the Yemen Conflict with night light images

March 26, 2017
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Using R to study the Yemen Conflict with night light images

The Yemeni civil war has received very little attention despite the growing humanitarian disaster. There is a lack of reliable figures on the extent of the human suffering in Yemen. The few data that is available suggests that it is immense. According to the UN, from March 2015 to August 2016, over 10,000 people have … Continue...

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New book and package pmfdR

March 26, 2017
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Processing and modelling financial data with R - My Portuguese book about finance and R was published a couple of months ago and, given its positive feedback, I decided to work on the english version immediately. You can find det...

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More book, more cricket! 2nd edition of my books now on Amazon

March 25, 2017
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More book, more cricket! 2nd edition of my  books now on Amazon

The 2nd edition of both my books a) Cricket analytics with cricketr b) Beaten by sheer pace – Cricket analytics with yorkr is now available on Amazon, both as Paperback and Kindle versions. Pick up your copies today!!! A) Cricket analytics with cricketr: Second Edition B) Beaten by sheer pace: Cricket analytics with yorkr(2nd edition) … Continue...

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R<-Slovakia meetup started to build community in Bratislava

March 25, 2017
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R<-Slovakia meetup started to build community in Bratislava

On 22. March a first special R related meetup called R<-Slovakia took place. As the name of the meetup group implies, it is based in Slovakia, in its capital - Bratislava. I am very happy to be the first speaker on this event ever. R<-Slovakia ha...

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R&lt;-Slovakia meetup started to build community in Bratislava

March 25, 2017
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R&lt;-Slovakia meetup started to build community in Bratislava

On 22. March a first special R related meetup called R<-Slovakia took place. As the name of the meetup group implies, it is based in Slovakia, in its capital - Bratislava. I am very happy to be the first speaker on this event ever. R<-Slovakia ha...

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RApiDatetime 0.0.2

March 25, 2017
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Two days after the initial 0.0.1 release, a new version of RApiDatetime has just arrived on CRAN. RApiDatetime provides six entry points for C-level functions of the R API for Date and Datetime calculations. The functions asPOSIXlt and asPOSIXct conv...

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Linear regression in “The Man who counted”

March 25, 2017
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Linear regression in “The Man who counted”

Recently, I got a book by Brasilian writer  Júlio César de Mello e Souza (published under pen name Malba Tahan), titled The Man who counted. Book is a collection of mathematical stories very similar to Scheherazada’s 1001 Nights, where mathematical story-telling is the center of book.                                                In story 5“In so many words”, Malba describes … Continue...

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Perform pairwise Wilcoxon test, classify groups by significance and plot results

March 25, 2017
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Perform pairwise Wilcoxon test, classify groups by significance and plot results

This post is the result of work performed in collaboration with my colleague Eleonora Paparelli (who actually did most of the work!). We wanted to compare several distributions using Wilcoxon test and summarize results (i.e. indicate the comparisons showing significant differences). R base includes pairwise.wilcox.test to perform Wilcoxon rank sum test between all pairs of

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Debugging Pipelines in R with Bizarro Pipe and Eager Assignment

March 25, 2017
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Debugging Pipelines in R with Bizarro Pipe and Eager Assignment

This is a note on debugging magrittr pipelines in R using Bizarro Pipe and eager assignment. Pipes in R The magrittr R package supplies an operator called “pipe” which is written as “%>%“. The pipe operator is partly famous due to its extensive use in dplyr and use by dplyr users. The pipe operator is … Continue...

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New Zealand election forecasts

March 25, 2017
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New Zealand election forecasts

Over the weekend I released a new webpage, connected to this blog, with forecasts for the New Zealand 2017 General Election. The aim is to go beyond poll aggregation to something that takes the uncertainty of the future into account, as well as relati...

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Suggests and Vignettes

March 24, 2017
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Dirk Eddelbuettel quite rightly reminded us the other day that Suggests is not Depends. I am sorry to say that I am one of those who are using Suggests… “casually”. Mea culpa. I must say that this is restricted to vignettes: there are no tests nor examples using suggested packages. But I am not checking… Continuar leyendo...

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