Searching for Speed In my previous post, I described the method I use for compiling Fortran (or C) into an R package using the .Call interface. This post will compare the speed of various implementations of the layer loss cost function. The Function Often, insurance or reinsurance is bought in ...

I am an enthusiastic proponent of using tidy data principles for dealing with text data. This kind of approach offers a fluent and flexible option not just for exploratory data analysis, but also for machine learning for text, including both unsupervised machine learning and supervised machine learning. I haven’t ...

Phishing is [still] the primary way attackers either commit a primary criminal act (i.e. phish a target to, say, install ransomware) or is the initial vehicle used to gain a foothold in an organization so they can perform other criminal operations to achieve some goal. As such, security teams, ...

This little helper adds functionality to the base R function strsplit - hence the same name! Der Beitrag Day 23 – little helper strsplit erschien zuerst auf STATWORX.

To be a proficient R user, you need to read and understand the material in the book Advanced R by Hadley Wickham. The second chapter in this book is on vocabulary - a list of functions from the base, stats and utils packages which all R users should be familiar ...

The k-means algorithm assumes the data is generated by a mixture of Gaussians, each having the same proportion and variance, and no covariance. These assumptions can be alleviated with a more generic algorithm: the CEM algorithm applied on a mixture of Gaussians. To illustrate this, we will first apply a ...

Introduction It is Christmas time! And what better time than this to write about the great tools that are available to all who like R and would like to publish their R work or even blog about it. This post is meant as a praise to the tools that are...

Introduction It is Christmas time! And what better time than this to write about the great tools that are available to all who like R and would like to publish their R work or even blog about it. This post is meant as a praise to the tools that are...

This little helper does the same thing as the "Find in files" search within RStudio. Der Beitrag Day 22 – little helper get_files erschien zuerst auf STATWORX.

Sometimes R is better off without RStudio. Objective: Running R Scripts in Batch Mode R supports batch mode out of the box. All it takes is to launch R script with rscript.exe in the command-line interface. set rscript=full-path-to-rscript.exe s...

Tableau has chart type called “Packed Bubble Chart”, while I haven’t really utilized packed bubble chart much, I always thought they are fun and beautiful. I wanted to try creating same chart using R, and I came across package called packcircles. Reading vignettes was really helpful to figure out ...

For the last Riddler of the year I attempt to solve both the Express and Classic Riddlers! Riddler Express: How Long Will it Take Santa to Place his Reindeer? We need to find out how long it will take Santa to place his reindeer in the correct sled positions, if ...

Introduction I’ve written some “tutorial”-like content recently—see here, here, and here—but I’ve been lacking on ideas for “original” content since then. With that said, I thought it would to try to re-create something with R. (Not too long ago I saw that Andrew Heiss did ...