Blog Archives

Boost Your Data Munging with R

June 29, 2016
By
Boost Your Data Munging with R

This article was first published on the toptal.com blog. Additionally be noticed that my blog is migrating to new host due to GitHub Pages drops support for RDiscount, Redcarpet, and RedCloth (Textile) markup engines. Old host will be still available but new posts will be published on jangorecki.gitlab.io, drop-in replacement after changing from github.io to gitlab.io. The R language...

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Boost Your Data Munging with R

June 29, 2016
By
Boost Your Data Munging with R

This article was first published on the toptal.com blog. Additionally be noticed that my blog is migrating to new host due to GitHub Pages drops support for RDiscount, Redcarpet, and RedCloth (Textile) markup engines. Old host will be still available but new posts will be published on jangorecki.gitlab.io, drop-in replacement after changing from github.io to gitlab.io. The R language...

Read more »

Solve common R problems efficiently with data.table

December 10, 2015
By

I was recently browsing stackoverflow.com (often called SO) for the most voted questions under R tag. To my surprise, many questions on the first page were quite well addressed with the data.table package. I found a few other questions that could benefit from a data.table answer, therefore went ahead and answered them. In this post, I’d like to summarise them along...

Read more »

Solve common R problems efficiently with data.table

December 10, 2015
By

I was recently browsing stackoverflow.com (often called SO) for the most voted questions under R tag. To my surprise, many questions on the first page were quite well addressed with the data.table package. I found a few other questions that could benefit from a data.table answer, therefore went ahead and answered them. In this post, I’d like to summarise them along...

Read more »

Scaling data.table using index

November 22, 2015
By
Scaling data.table using index

R can handle fairly big data working on a single machine, 2B (2E9) rows and couple of columns require about 100 GB of memory. This is already well enough to care about performance. With this post I'm going discuss scalability of filter queries. The index has been introduced to data.table in 1.9.4. It is also known as secondary keys. Unlike...

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Scaling data.table using index

November 22, 2015
By
Scaling data.table using index

R can handle fairly big data working on a single machine, 2B (2E9) rows and couple of columns require about 100 GB of memory. This is already well enough to care about performance. With this post I'm going discuss scalability of filter queries. The index has been introduced to data.table in 1.9.4. It is also known as secondary keys. Unlike...

Read more »

Utilize function body inline comments for documentation

September 17, 2015
By
Utilize function body inline comments for documentation

When writing a long function which has to deal with multiple checks and complex processes, it is valuable to put comments in the function body. This allows readers (including you) to catch the concept of process workflow without going into details. I'm going to present a way how those comments can be nicely reused for the documentation purpose. The...

Read more »

Utilize function body inline comments for documentation

September 17, 2015
By
Utilize function body inline comments for documentation

When writing a long function which has to deal with multiple checks and complex processes, it is valuable to put comments in the function body. This allows readers (including you) to catch the concept of process workflow without going into details. I'm going to present a way how those comments can be nicely reused for the documentation purpose. The...

Read more »

Accept payments in shiny app

August 3, 2015
By
Accept payments in shiny app

Have you ever think about accepting payments in your shiny app? Probably not, but now you can start ;) Shiny apps are usually single task, not very heavy websites. It may be not so easy to turn them into online shop/service provider. Anyway you can find this post interesting as it presents a paperwork-less implementation to accept payments. Some notable features...

Read more »

Accept payments in shiny app

August 3, 2015
By
Accept payments in shiny app

Have you ever think about accepting payments in your shiny app? Probably not, but now you can start ;) Shiny apps are usually single task, not very heavy websites. It may be not so easy to turn them into online shop/service provider. Anyway you can find this post interesting as it presents a paperwork-less implementation to accept payments. Some notable features...

Read more »

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