Blog Archives

githubinstall: New R Package for Easy to Install R Packages on GitHub

June 14, 2016
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1. OverviewA growing number of R packages are created by various people in the world. A part of the cause of it is the devtools package that makes it easy to develop R packages . The devtools package not only facilitates the process to develop R packages but also provides an another way to distribute R packages.When developers...

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densratio: New R Package for Density Ratio Estimation

March 31, 2016
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densratio: New R Package for Density Ratio Estimation

1. OverviewDensity ratio estimation is described as follows: for given two data samples $x$ and $y$ from unknown distributions $p(x)$ and $q(y)$ respectively, estimate $$ w(x) = frac{p(x)}{q(x)} $$ where $x$ and $y$ are $d$-dimensional real numbers.The estimated density ratio function $w(x)$ can be used in many applications such as the inlier-based outlier detection and...

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New package "dplyrr" – Utilities for comfortable use of dplyr with databases

August 4, 2015
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1. Overview dplyr is the most powerful package for data handling in R, and it has also the ability of working with databases(See Vignette). But the functionalities of dealing with databases in dplyr is developing yet. Now, I'm trying to make dplyr with databases more comfortable by using some functions. For that purpose, I've created dplyrr...

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The complete catalog of argument variations of select() in dplyr

July 28, 2015
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When I read the dplyr vignette, I found a convenient way to select sequential columns such as select(data, year:day). Because I had inputted only column names to select() function, I was deeply affected by the convenient way. On closer inspection, I found that the select() function accepts many types of input. Here, I will enumerate the variety...

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