R-bloggers - Part 18

Making Your Programs More Powerful with #include and #define for C

October 8, 2024 | Steven P. Sanderson II, MPH

Introduction C programming is one of the oldest and most influential programming languages, known for its structured programming, recursion, and portability. As a beginner C programmer, you’re about to embark on an exciting journey into a langu...

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Use nanoparquet instead of readr/CSV

October 8, 2024 | Stephen Turner

This is reposted from the original at https://blog.stephenturner.us/p/use-nanoparquet-instead-of-readr-csv.Parquet is interoperable between Python and R, fast to read+write, works well with databases, and stores complex data types (e.g., tib...

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PowerQuery Puzzle solved with R

October 8, 2024 | Numbers around us

#223–224PuzzlesAuthor: ExcelBIAll files (xlsx with puzzle and R with solution) for each and every puzzle are available on my Github. Enjoy.Puzzle #223As usual on weekends we are mainly doing table transformations. Sometimes it need simple manouvers and...

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DuckDB vs dplyr vs base R

October 8, 2024 | Stephen Turner

Reposted from https://blog.stephenturner.us/p/duckdb-vs-dplyr-vs-base-r.TL;DR: For a very simple analysis (means by group on 100M rows), duckdb was 125x faster than base R, and 28x faster than readr+dplyr, without having to read data from disk int...

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The Vibe of Flanders: Part 2

October 7, 2024 | Method Matters

This blog post is the second installment in a series detailing analyses of the 2023 De Gemeente-Stadsmonitor (The Municipality and City Monitor) survey, conducted in the region of Flanders in Belgium. You can check out the first post here. In the previous post, we used Principal Components Analysis and data visualization ...

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How to Combine Two Columns into One in R With Examples in Base R and tidyr

October 7, 2024 | Steven P. Sanderson II, MPH

Introduction As a beginner R programmer, you’ll often encounter situations where you need to manipulate data frames by combining columns. This article will guide you through the process of combining two columns into one in R, using both base R ...

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Can ChatGPT help construct non-trivial statistical models? An example with Bayesian “random” splines

October 7, 2024 | Keith Goldfeld

I’ve been curious to see how helpful ChatGPT can be for implementing relatively complicated models in R. About two years ago, I described a model for estimating a treatment effect in a cluster-randomized stepped wedge trial. We used a generalized ad...

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R Solution for Excel Puzzles

October 7, 2024 | Numbers around us

Puzzles no. 554–558PuzzlesAuthor: ExcelBIAll files (xlsx with puzzle and R with solution) for each and every puzzle are available on my Github. Enjoy.Puzzle #554Another interesting number called after Indian mathematician. We need to find first 50 Kapr...

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Standardising R Projects with the ProjectTemplate package workshop

October 7, 2024 | Dariia Mykhailyshyna

Join our workshop on Standardising R Projects with the ProjectTemplate package, which is a part of our workshops for Ukraine series! Here’s some more info: Title: Standardising R Projects with the ProjectTemplate package Date: Thursday, November 7th, 14:00 – 16:00 CET (Rome, Berlin, Paris timezone) Speaker: Michael Rasmussen is a data analyst ... [Read more...]

Exploratory Data Analysis: Will PCE Data Push Bitcoin?

October 7, 2024 | Selcuk Disci

Could the latest PCE data catalyze Bitcoin to surge beyond major resistance and reach $70K? The last time that US PCE Price Index values were under the estimates (miss), BTC prices rocketed. Source code:

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How to Combine Rows with Same Column Values in R

October 6, 2024 | Steven P. Sanderson II, MPH

Introduction Combining rows with the same column values is a fundamental task in data analysis and manipulation, especially when handling large datasets. This guide is tailored for beginner R programmers looking to efficiently merge rows using ...

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Nested unit tests with testthat

October 6, 2024 | R some blog

The testthat package is the most widely used tool for unit testing in R. However, many users may not be aware of the possibility to nest test blocks within each other. In this post, I demonstrate how this underused feature provides a great way to struc... [Read more...]

oaqc: Orbit aware quad census package back on CRAN

October 6, 2024 | David Schoch

This is just a short announcement post that the R package oaqc is back on CRAN. The package provides an efficient algorithm to calculate for a given graph the orbit-aware quad census. More precisely the frequency distribution of all induced and ... [Read more...]

Handling Large Investment Datasets with R: A Powerful Solution to Data Management Challenges

October 6, 2024 | Murtaza Haider

Dealing with large datasets—where observations run into the millions and file sizes reach gigabytes or more—can be daunting for many data practitioners. However, there is no shortage of specialized tools, many of which are open source, that offer effic...

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Dudeney’s Remainder Problem

October 6, 2024 | John Mount

The remainder problem The description of this puzzle really cracks me up (Dudeney, Strand Magazine, January 1924). Health risks aside, how do we find the maximal integer d such that (480608 % d) = (508811 % d) = (723217 % d)? The solution A good puzzle strategy is to try […]

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Gradient-Boosting anything (alert: high performance)

October 5, 2024 | T. Moudiki

Gradient boosting with any regression algorithm in Python package mlsauce

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Second edition of Geocomputation with R is complete

October 5, 2024 | Jakub Nowosad, Robin Lovelace, Jannes Muenchow

We are excited to announce that the second edition of Geocomputation with R is (almost) complete. It took us about three years to update and improve the book. This blog post summarizes the process and lists things we added and changed. It also me...

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Is round(0.5) 0 or 1?

October 5, 2024 | jhk0530

Actually, it’s both possible This Article was originally published before on YOZM-IT as Korean Various way of data science There are many programming languages in the world and software that utilizes them. And those play an important role in “Data science”. For example, if you’re using funnel analysis ...

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Getting started with SQL with R

October 4, 2024 | Albert Rapp

In today’s blog post, I’m showing you how to work with databases from within R. As always, you can find the video version of this blog post on YouTube: Establish a connection Let us start by setting up a database connection. library(odbc) lib... [Read more...]

An Easy Puzzle: The Perplexed Banker

October 4, 2024 | John Mount

Nina Zumel continues with the puzzles. This one is “The Perplexed Banker”. In my opinion, this one captures the essence of the “mathematical” aspect of a puzzle. For a mathematical puzzle one often hopes there is a systematic method that makes the puzzle easy. In this case there is indeed […] [Read more...]

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