July 2021

The essential functions of R cheatsheet

July 18, 2021 | R on R (for ecology)

? Download link is at the bottom of the post ? Something that I quickly came to learn as an ecologist using R is that out of the hundreds (possibly thousands?) of functions available in R, only a handful were those that I used frequently throughout my ... [Read more...]

Bootstrapping the Zero Curve from IRS Swap Rates using R code

July 18, 2021 | Di Cook

This post explains how to generate the zero curve from market swap rates using bootstrapping. For the same 5-Year Libor IRS which is dealt with the previous post, we use Excel illustrations for clear understanding and then make a R code. Boot...

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COUNTIF Function in R

July 17, 2021 | finnstats

COUNTIF Function in R, As we know if we want to count the length of the vector we can make use of the length... The post COUNTIF Function in R appeared first on finnstats.

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analogsea: Using Arrow, S3 and DigitalOcean for efficient model fitting in RStudio

July 16, 2021 | Pachá

Introduction This tutorial explains how to use arrow with analogsea to take fully advantage from S3 filesystems and parallel computing. Analogsea is a community project created by and for statisticians from the R community: Scott Chamberlain, Hadl...

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The Elon Musk Tweet Effect on Dogecoin (DOGE)

July 16, 2021 | Quantargo Blog

The Elon Musk Tweet Effect on Dogecoin (DOGE) Unveil the Dogefather Elon Musk is known for his regular tweets about many different topics—in particular his companies Tesla and SpaceX. With close to 60 million followers he truly is a Twitter celebrity and his opinions have a big impact on technologies ...

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Using R — Packaging a C library in 15 minutes

July 16, 2021 | jonathanatmazamascience

Yes, this post condenses 50+ hours of learning into a 15 minute tutorial. Read ’em and weep. (That is, you read while I weep.) OK. For the last week I’ve been learning how to call C code as documented in previous posts: Calling C code “Hello World!”, .Call(“hello”) and Calling ...

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Using R — Calling C code with Rcpp

July 16, 2021 | jonathanatmazamascience

In two previous posts we described how R can call C code with .C() and the more complex yet more robust option of calling C code with .Call(). Here we will describe how the Rcpp package can be used to greatly simplify your C code without forcing you to become ... [Read more...]

Using R – .Call(“hello”)

July 16, 2021 | jonathanatmazamascience

In an introductory post on R APIs to C code, Calling C Code ‘Hello World!’, we explored the .C() function with some ‘Hello World!’ baby steps. In this post we will make a leap forward by implementing the same functionality using the .Call() function. Is .Call() better than .C()? A ... [Read more...]

Using R – Calling C code ‘Hello World!’

July 16, 2021 | jonathanatmazamascience

One of the reasons that R has so much functionality is that people have incorporated a lot of academic code written in C, C++, Fortran and Java into various packages. Libraries written in these languages are often both robust and fast. If you are using R to support people in ... [Read more...]

Data Structures – Tabular vs. Relational

July 16, 2021 | jonathanatmazamascience

With enough effort it is possible to fit a square peg into a round hole. But we have all learned — sometimes more than once — that it is much easier if peg and hole have the same shape. Data managers also need to carefully consider the shape of their data to ... [Read more...]

Little useless-useful R functions – Colourful ggplot line graphs

July 16, 2021 | tomaztsql

How about some colours in line graph? Or even more wacky? Nevertheless, let’s create a function that generates some sample “mocked” data and draws a line chart: And run all together with three parameters: n – number of data points…Read more ›

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Trying to fight cabin fever? The types of parks near your home matters

July 15, 2021 | R | XP

The COVID-19 pandemic is changing the way we work and play1. As more people work remotely from home, visits to local parks have surged as people look for ways to stay active, find solace and quench their thirst for adventure2. Such opportunities fo...

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Logging and error handling in operational systems

July 15, 2021 | jonathanatmazamascience

Operational systems, by definition, need to work without human input. Systems are considered “operational” after they have ben thoroughly tested and shown to work properly with a variety of input. However, no software is perfect and no real-world system operates with 100% availability or 100% consistent input. Things occasionally go wrong – perhaps ... [Read more...]

multinomial but unique

July 15, 2021 | xi'an

A quick riddle from the Riddler, where the multinomial M(n¹,n²,100-n¹-n²) probability of getting three different labels out of three possible ones out of three draws is 20%, inducing a single possible value for (n¹,n²) up to a permutation. Since this probability is n¹n²(100-n¹-n²)/161,700, ...

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When k-means clustering fails

July 15, 2021 | jonathanatmazamascience

Letting the computer automatically find groupings in data is incredibly powerful and is at the heart of “data mining” and “machine learning”. One of the most widely used methods for clustering data is k-means clustering. Unfortunately, k-means clustering can fail spectacularly as in the example below. Centroid-based clustering algorithms work ...

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User Tests – Build Better Shiny Apps with Effective User Testing

July 15, 2021 | Appsilon

Why User Tests useR! 2021 Presentation: How to Conduct Effective User Tests Good Practices Q&A From Maria’s Presentation at UseR! 2021 useR! 2021 Follow Up Why User Tests User tests are paramount for creating a smoother development process and ultimately, a user-friendly tool. It’s easy to lose track of the ...

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FeatureTerminatoR – a package to remove unimportant variables from statistical and machine learning models automatically

July 15, 2021 | Gary Hutson

The motivation for this package is simple, while there are many packages that do similar things, few of them perform automated removal of the features from your models. This was the motivation, plus having them all in one location to enable you to easily find them, otherwise you would be ...

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Hosting Shiny Apps with RStudio Connect

July 15, 2021 | Peter Solymos

RStudio Connect provides enterprise-level publishing capabilities for data science applications, including Shiny.

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A CEO’s View of Open Source Data Science in the Enterprise

July 14, 2021 | RStudio | Open source & professional software for data science teams on RStudio

Sharing customer stories While the use and scope of open source data science continues to grow, we still sometimes hear from RStudio users and customers that they face some opposition, or at least questions, from IT or other stakeholders when champi...

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R Consortium Diversity & Inclusion – Speaker Nomination

July 14, 2021 | R Consortium

By Samantha Toet, Derrick Kearney, Sydeaka Watson, Gwynn Sturdevant, Kevin O’Brien, and Joe Rickert We’re trying something new and we want your support. One of the goals of the R-Consortium... The post R Consortium Diversity & Inclusion – Speaker Nomination appeared first on R Consortium.

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R-bloggers

R news and tutorials contributed by hundreds of R bloggers

July 2021

The essential functions of R cheatsheet

Bootstrapping the Zero Curve from IRS Swap Rates using R code

COUNTIF Function in R

analogsea: Using Arrow, S3 and DigitalOcean for efficient model fitting in RStudio

The Elon Musk Tweet Effect on Dogecoin (DOGE)

Using R — Packaging a C library in 15 minutes

Using R — Calling C code with Rcpp

Using R – .Call(“hello”)

Using R – Calling C code ‘Hello World!’

Data Structures – Tabular vs. Relational

Little useless-useful R functions – Colourful ggplot line graphs

Trying to fight cabin fever? The types of parks near your home matters

Logging and error handling in operational systems

multinomial but unique

When k-means clustering fails

User Tests – Build Better Shiny Apps with Effective User Testing

FeatureTerminatoR – a package to remove unimportant variables from statistical and machine learning models automatically

Hosting Shiny Apps with RStudio Connect

A CEO’s View of Open Source Data Science in the Enterprise

R Consortium Diversity & Inclusion – Speaker Nomination

July 2021

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