Monthly Archives: August 2017

RcppAnnoy 0.0.9

August 31, 2017
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RcppAnnoy 0.0.9

An new version 0.0.9 of RcppAnnoy, our Rcpp-based R integration of the nifty Annoy library by Erik, is now on CRAN. Annoy is a small and lightweight C++ template header library for very fast approximate nearest neighbours. This release corrects an is...

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OpenML Workshop 2017

August 31, 2017
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What is OpenML? The field of Machine Learning has grown tremendously over the last years, and is a key component of data-driven science. Data analysis algorithms are being invented and used every day, but their results and experiments are published almost exclusively in journals or separated repositories. However, data by itself has no value. It’s the ever-changing ecosystem surrounding data...

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Mapping to a ‘t'(map)

August 31, 2017
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Mapping to a ‘t'(map)

tmap More maps of the Highlands? Yep, same as last time, but no need to install dev versions of anything, we can get awesome maps courtesy of the tmap package. Get the shapefile from the last post library(tmap) library(tmaptools) library(viridis) scot

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Multiplicative Congruential Generators in R

August 31, 2017
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Multiplicative Congruential Generators in R

Part 2 of 2 in the series Random Number GenerationMultiplicative congruential generators, also known as Lehmer random number generators, is a type of linear congruential generator for generating pseudorandom numbers in . The multiplicative congruential generator, often abbreviated as MLCG or MCG, is defined as a recurrence relation similar to... The post Multiplicative Congruential Generators in R appeared first on...

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Probability functions intermediate

August 31, 2017
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Probability functions intermediate

In this set of exercises, we are going to explore some of the probability functions in R by using practical applications. Basic probability knowledge is required. In case you are not familiarized with the function apply, check the R documentation. Note: We are going to use random numbers functions and random processes functions in R Related exercise sets: Lets Begin...

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DEADLINE EXTENDED: Last call for Boston EARL abstracts

August 31, 2017
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DEADLINE EXTENDED: Last call for Boston EARL abstracts

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Text featurization with the Microsoft ML package

August 31, 2017
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Text featurization with the Microsoft ML package

Last week I wrote about how you can use the MicrosoftML package in Microsoft R to featurize images: reduce an image to a vector of 4096 numbers that quantify the essential characteristics of the image, according to an AI vision model. You can perform a similar featurization process with text as well, but in this case you have a...

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Why to use the replyr R package

August 31, 2017
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Why to use the replyr R package

Recently I noticed that the R package sparklyr had the following odd behavior: suppressPackageStartupMessages(library("dplyr")) library("sparklyr") packageVersion("dplyr") #__ '0.7.2.9000' packageVersion("sparklyr") #__ '0.6.2' packageVersion("dbplyr") #__ '1.1.0.9000' sc * Using Spark: 2.1.0 d NA ncol(d) #__ NA nrow(d) #__ NA … Continue reading Why to use the replyr R package

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Pulling Data Out of Census Spreadsheets Using R

August 31, 2017
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In this post, I show a method for extracting small amounts of data from somewhat large Census Bureau Excel spreadsheets, using R.  The objects of interest are expenditures of state and local governments on hospital capital in Iowa for the years 2004 to 2014. The data can be found at http://www2.census.gov/govs/local/. The files at the Related Post Extracting Tables from...

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Community Call – rOpenSci Software Review and Onboarding

August 31, 2017
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Are you thinking about submitting a package to rOpenSci's open peer software review? Considering volunteering to review for the first time? Maybe you're an experienced package author or reviewer and have ideas about how we can improve. Join our Community Call on Wednesday, September 13th. We want to get your feedback and we'd love to answer your questions! Agenda Welcome (Stefanie Butland,...

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