Articles by Marcin Kosiński

Warsaw R Enthusiast Meetups Season Finale

September 27, 2016 | 0 Comments

Warsaw R and Data Analytics Enthusiast group is an effort that aims at integrating users of the R language in Warsaw, Poland. Our group has over 970 members at its meetup page. In this post I provide a summary of our group, our last 2 meetups before t... [Read more...]

Monitoring R Applications with RZabbix

September 14, 2016 | 0 Comments

As R users we mostly perform analysis, produce reports and create interactive shiny applications. Those are rather one-time performances. Sometimes, however, the R developer enters the world of the real software development, where R applications shoul... [Read more...]

LDAvis Show Case on R-Bloggers

June 21, 2016 | 0 Comments

Text mining is a new challenge for machine wandering practitioners. The increased interest in the text mining is caused by an augmentation of internet users and by rapid growth of the internet data which is said that in 80% is a text data. Extracting information from articles, news, posts and comments ... [Read more...]

Venn Diagram Comparison of Boruta, FSelectorRcpp and GLMnet Algorithms

June 18, 2016 | 0 Comments

Feature selection is a process of extracting valuable features that have significant influence on dependent variable. This is still an active field of research and machine wandering. In this post I compare few feature selection algorithms: traditional GLM with regularization, computationally demanding Boruta and entropy based filter from FSelectorRcpp (free ... [Read more...]

R Hero saves Backup City with archivist and GitHub

June 14, 2016 | 0 Comments

Have you ever suffered because of the impossibility of reproducing graphs, tables or analysis’ results in R? Have you ever bothered yourself for not being able to share R objects (i.e., plots or final analysis models) within your reports, posters or articles? Or maybe simply you have too many ... [Read more...]

Survival plots have never been so informative

May 22, 2016 | 0 Comments

Hadley Wickham’s ggplot2 version 2.0 revolution, at the end of 2015, triggered many crashes in dependent R packages, that finally led to deletions of few packages from The Comprehensive R Archive Network. It occured that survMisc package was removed from CRAN on 27th of January 2016 and R world remained helpless in ... [Read more...]

R 3.3.0 is another motivation for Docker

May 12, 2016 | 0 Comments

Have you ever encountered R packages versioning issues when one application required different dependent packages versions than other? Have you ever got stuck with your project because of wrong pre-installed software versions on machine on which you should run your code? Or maybe you had heavy adventures with installing R ... [Read more...]

RTCGA factory of R packages – Quick Guide

May 3, 2016 | 0 Comments

Yesterday we have been delivered with the new version of R - R 3.3.0 (codename Supposedly Educational). This enabled Bioconductor (yes, not all packages are distributed on CRAN) to release it’s new version 3.3. This means that all packages held on Bioconductor, that were under rapid and vivid development, have been ...
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Improve your shiny dashboard with Disqus panel

April 19, 2016 | 0 Comments

Getting users feedback is always a pleasant moment. In most cases in World of Open Source we are creating tools and applications for people and we love to hear that someone thinks our (generally pet) project is useful. Mostly this moment is nicer than any paycheck. But how author can ... [Read more...]

Answers to FAQ about SparkR for R users

April 5, 2016 | 0 Comments

Many people keep asking me whether I have tried SparkR, is it worth using, is it sexy or WHAT is it at all. I felt that creating frequently asked questions (FAQ) in the field of WHAT is that Spark/SparkR? would help many R Scientists to understand this Big Data ... [Read more...]
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