May 2018

Investing for the Long Run

May 12, 2018 | Marcelo S. Perlin

- I often get asked about how to invest in the stock market. Not surprisingly, this has been a common topic in my classes. Brazil is experiencing a big change in its financial scenario. Historically, fixed income instruments paid a large premium over the stock market and that is no longer ... [Read more...]

Investing for the Long Run

May 11, 2018 | R on msperlin

I often get asked about how to invest in the stock market. Not surprisingly, this has been a common topic in my classes. Brazil is experiencing a big change in its financial scenario. Historically, fixed income instruments paid a large premium over the stock market and that is no longer ... [Read more...]

Monte Carlo-based prediction intervals for nonlinear regression

May 11, 2018 | anspiess

Calculation of the propagated uncertainty using (1), where is the gradient and the covariance matrix of the coefficients , is called the “Delta Method” and is widely applied in nonlinear least-squares (NLS) fitting. However, this method is based on first-order Taylor expansion and thus assummes linearity around . The second-order approach can partially ...
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Custom R charts coming to Excel

May 11, 2018 | David Smith

This week at the BUILD conference, Microsoft announced that Power BI custom visuals will soon be available as charts with Excel. You'll be able to choose a range of data within an Excel workbook, and pass those data to one of the built-in Power BI custom visuals, or one you've ... [Read more...]

How to Plot With Dygraphs

May 11, 2018 | Euthymios Kasvikis

The dygraphs package is an R interface to the dygraphs JavaScript charting library. It provides rich facilities for charting time-series data in R, including: 1. Automatically plots xts time-series objects (or any object convertible to xts.) 2. Highly configurable axis and series display (including optional second Y-axis.) 3. Rich interactive features, including zoom/... [Read more...]

goodpractice 1.0.2 on CRAN

May 11, 2018 | Mango Solutions

Hannah Frick, Data Scientist We are excited to annouce that the goodpractice package is now available on CRAN. The package gives advice about good practices when building R packages. Advice includes functions and syntax to avoid, package structure, code complexity, code formatting, etc. You can install the CRAN version via {{...
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Basic R Automation

May 11, 2018 | Super User

Last Wednesday, a small presentation was given at the RBelgium meetup in Brussels on Basic R Automation. For those of you who could not attend, here are the slides of that presentation which showed the use of the cronR and taskscheduleR R packages for ... [Read more...]

Create and Format a Google Sheet Within R: Exercises

May 10, 2018 | sindri

In this exercise set, we will practice using the Google Sheets package to create and manipulate a Google spreadsheet within R. After completing this exercise set, you will be able to prepare a basic Google Sheets document using just R, leaving behind a reproducible R-script. Note that using Google Sheets ...
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2018 R Conferences

May 10, 2018 | R Views

rstudio::conf 2018 and the New York R Conference are both behind us, but we are rushing headlong into the season for conferences focused on the R Language and its applications. The European R Users Meeting (eRum) begins this coming Monday, May 14th, in Budapest with three days of workshops and ...
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the riddle of the stands

May 10, 2018 | xi'an

The simple riddle of last week on The Riddler, about the minimum number of urinals needed for n men to pee if the occupation rule is to stay as far as possible from anyone there and never to stand next to another man,  is quickly solved by an R code: ...
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rquery: SQL from R

May 10, 2018 | John Mount

My BARUG rquery talk went very well, thank you very much to the attendees for being an attentive and generous audience. (John teaching rquery at BARUG, photo credit: Timothy Liu) I am now looking for invitations to give a streamlined version of this talk privately to groups using R who ...
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Exploratory Factor Analysis in R

May 10, 2018 | Perceptive Analytics

Changing Your Viewpoint for Factors In real life, data tends to follow some patterns but the reasons are not apparent right from the start of the data analysis. Taking a common example of a demographics based survey, many people will answer questions in a particular ‘way’. For example, all married ...
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NYC Data Science Academy Introduces Remote Intensive Bootcamp

May 10, 2018 | claire.tu

Full-time remote intensive data science bootcamp with live daily lectures is now available to individuals outside of the NYC area.   NYC Data Science Academy has announced the launch of its remote intensive bootcamp, open to technology enthusiasts outside of the New York City area. The first cohort will begin on ...
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Scientific debt

May 10, 2018 | David Robinson

A very useful concept in software engineering is technical debt. Technical debt occurs when engineers choose a quick but suboptimal solution to a problem, or don’t spend time to build sustainable infrastructure. Maybe they’re using an approach that doesn’t scale well as the team and codebase expand (...
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