2019

Using Spark from R for performance with arbitrary code – Part 5 – Exploring the invoke API from R with Java reflection and examining invokes with logs

November 23, 2019 | Jozef's Rblog

Introduction In the previous parts of this series, we have shown how to write functions as both combinations of dplyr verbs, SQL query generators that can be executed by Spark and how to use the lower-level API to invoke methods on Java object references from R. In this fifth part, ...

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A shinytest script in testthat

November 22, 2019 | Stéphane Laurent

The shiny app Here is a simple shiny app: library(shiny) library(ggplot2) # UI #### ui [Read more...]

if ifelse() had more if’s, AND an else

November 22, 2019 | kaijagahm

Problem The case_when() function in dplyr is great for dealing with multiple complex conditions (if’s). But how do you specify an “else” condition in case_when()? Context Last month, I was super excited to discover the case_when() function in dplyr. But when I showed my blog post ...

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Econometrics postdoc and computational statistics postdoc openings here in the Stan group at Columbia

November 22, 2019 | Bob Carpenter

Andrew and I are looking to hire two postdocs to join the Stan group at Columbia starting January 2020. I want to emphasize that these are postdoc positions, not programmer positions. So while each position has a practical focus, our broader goal is to carry out high-impact, practical research that pushes ... [Read more...]

satRday Cardiff 2019 recap

November 22, 2019 | Dominik Krzemiński

SatRday events have become a more and more popular format of R conference series. They are based on such values as inclusivity, affordability and are made for and by real R enthusiasts, so all values important to Appsilon. With great pleasure we decided to support a recent edition of SatRday ...

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XI Conference of R Users (Madrid, Spain, Nov 14-16) Welcomes Over 200 Attendees

November 22, 2019 | R Consortium

Thank you to Carlos Ortega, Principal Data Scientist, Teradata, for providing this summary and pictures from the conference The XI Conference of R Users (XI Jornadas de Usuarios de R),... The post XI Conference of R Users (Madrid, Spain, Nov 14-16) Welcomes Over 200 Attendees appeared first on R Consortium.

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Playing with averages

November 21, 2019 | R on OSM

In a previous post we compared the results from employing a 200-day moving average tactical allocation strategy to a simple buy-and-hold investment in the S&P500. Over the total period, the 200-day produced a higher cumulative return as well as ...

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Recap of R-Ladies Charlottesville Forwards Workshop

November 21, 2019 | Blog on FORWARDS

On September 8, 2019, Samantha Toet and Angela Li co-taught a 3-hour Forwards Package Development Workshop at a weekend R-Ladies Charlottesville Meetup. The workshop took place as a result of Angela being in town - she reached out to Sam and suggested... [Read more...]

Playing with averages

November 21, 2019 | R on OSM

In a previous post we compared the results from employing a 200-day moving average tactical allocation strategy to a simple buy-and-hold investment in the S&P500. Over the total period, the 200-day produced a higher cumulative return as well as better risk-adjusted returns. However, those metrics did erode over time ...

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blastula v0.3

November 21, 2019 | Posts | R & R

English French German The newest release of the blastula package lets you to do amazing things with HTML email in R and RStudio Connect. You can install blastula 0.3 from CRAN with:

install.packages("blastula")

This is a huge release! There are so many new and improved features we won’t be able ...

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The significance of experience on the salary of engineers in Sweden

November 21, 2019 | n n R Analystatistics Swedenn

What causes the salary to change during the working life of engineers in Sweden? I will examine data from Statistics Sweden to see what information you can interpret from it. Statistics Sweden is the Swedish government agency responsible for producing official statistics regarding Sweden, https://www.scb.se/en/. “Everybody ... [Read more...]

Gold-Mining Week 12 (2019)

November 21, 2019 | Michael Griebe

Week 12 Gold Mining and Fantasy Football Projection Roundup now available. The post Gold-Mining Week 12 (2019) appeared first on Fantasy Football Analytics. [Read more...]

Package management: Using repositories in production systems

November 21, 2019 | eoda GmbH

Data science is characterized among other things using open source tools. An advantage when working with open source languages such as R or Python is the large package world. This provides tools for numerous use cases and problems through the development within huge communities. The packages are organized in digital ...

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Tuning Random Forest on Time Series Data

November 21, 2019 | Manuel Tilgner

Training random forests on time series is one thing, but tuning them? It’s not like you can just apply cross validation and be done with it. Or can you? This post forms part two our mini-series “Time Series Forecasting with Random Forest”. Find out how you can tune the ...

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Rammstein vs. Lacrimosa

November 20, 2019 | Code R

Some time ago, someone I follow on twitter posted about having to buy a whole book with rules to tease out grammatical gender in German. Further down the replies, someone reminisced about trying (and failing) to learn German just by listening to Rammstein’s lyrics. I studied about drei Jahre ...

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Visualizing the Premier League So Far, Part 1: Overview with xPts Tables and xG Plots

November 20, 2019 | R by R(yo)

It’s the November International Break and we’re around a third of the season through in the Premier League. To break the monotony I decided to do a blog post exploring how teams are doing so far according to a variety of metri... [Read more...]

Rammstein vs. Lacrimosa

November 20, 2019 | Code R

Some time ago, someone I follow on twitter posted about having to buy a whole book with rules to tease out grammatical gender in German. Further down the replies, someone reminisced about trying (and failing) to learn German just by listening to Rammstein’s lyrics. I studied about drei Jahre ...

[Read more...]

Five-parameters logistic regression

November 19, 2019 | Stéphane Laurent

The five-parameters logistic curve is commonly defined by \[ f(x) = A + \frac{D-A}{\Bigl(1+\exp\bigl(B(C-x)\bigr)\Bigr)^S}. \] Assuming \(B__0\) and \(S__0\), ... [Read more...]

BayesComp 20 [schedule]

November 19, 2019 | xi'an

The schedule for the program is now available on the conference webpage of BayesComp 20, for the days of 7-10 Jan 2020. There are twelve invited sessions, including one j-ISBA session, and a further thirteen contributed sessions were selected by the scientific committee. And three tutorials on the first day. Looking forward ...

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New Course: Statistics Intermediate in R: Averages and Variability

November 19, 2019 | Charlie Custer

Learn how to use average and variability measures like mean, median, mode, range, standard deviation, z-scores, and more in this hands-on R statistics course. The post New Course: Statistics Intermediate in R: Averages and Variability appeared first on Dataquest. [Read more...]

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