848 search results for "Register"

satRday in Cape Town

December 16, 2016
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satRday in Cape Town

A celebration of R - In just two months time, the second satRday will be taking place right on my doorstep, in Cape Town, South Africa. I keep telling people I am looking forward to it, but to be honest that’s really quite an understatement. ...

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Introducing hugo!

December 11, 2016
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Introducing hugo!

Fun with bot frameworks - Roughly two months ago, I embarked on a short mission: to setup an instance of hubot for integration with Slack. Despite being armed with only a very limited working knowledge of Javascript (hubot runs on node.js and sc...

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Replicating CRSP Volatility Decile Portfolios in R

December 7, 2016
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Replicating CRSP Volatility Decile Portfolios in R

  Introduction In this post, I provide R code that enables the replication of the Center for Research in Security Prices (CRSP) Volatiliy Deciles using Yahoo! Finance data. This post is related to my last blog post in that it will generate the CRSP low volatility decile portfolio, thereby facilitating the replication of the associated … Continue...

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Structural Equation Modelling in R (Part 1)

December 6, 2016
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Structural Equation Modelling in R (Part 1)

Brief explanation Structural Equation Modelling (SEM) is a state of art methodology and fulfills much of broader discusion about statistical modeling, and allows to make inference and causal analysis. SEM models are regression models braodly used in Marketing, Human Resources, Biostatistics and Medicine, revealing their flexibility as analytical tool. Despite being a state-of-the-art methodology, SEM does not create new developments of...

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Why time series forecasts prediction intervals aren’t as good as we’d hope

December 6, 2016
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Why time series forecasts prediction intervals aren’t as good as we’d hope

Five different sources of error When it comes to time series forecasts from a statistical model we have five sources of error: Random individual errors Random estimates of parameters (eg the coefficients for each autoregressive term) Uncertain...

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Top 5 R Package Maintainers

December 5, 2016
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Top 5 R Package Maintainers

The R Community is powered by open course contributions from a wide variety of individuals. Anyone can create and distribute R packages that benefit the R community and make it easier for R users all over the world to work with their code. Some R use...

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How to send bulk email to your students using R

December 1, 2016
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How to send bulk email to your students using R

In this post I write about a technique I use to send personalized bulk emails to my students at the open and distance education university where I teach (the Universidad Nacional Abierta in Venezuela, or UNA, for short). Being able to mass-email students with personalized messages is should be an important issue in any distance education setup. However, as...

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Plotting my trips with ubeR

November 27, 2016
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Plotting my trips with ubeR

@drsimonj here to explain how I used ubeR, an R package for the Uber API, to create this map of my trips over the last couple of years:  Getting ubeR The ubeR package, which I first heard about here, is currently available on GitHub. In R, install and load it as follows: Read more »

Error, trend, seasonality – ets and its forecast model friends

November 26, 2016
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Error, trend, seasonality –  ets and its forecast model friends

A broad family of fast and effective forecast methods Exponential smoothing state space methods constitute a broad family of approaches to univariate time series forecasting that have been around for many decades and only in the twenty-first century pl...

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R Phone Home: Notifications with pushoverr

November 23, 2016
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R Phone Home: Notifications with pushoverr

There are a lot of times when it would be great if your computer talked to you. pushoverr allows you to send yourself or your group notifications from R. Instead of compulsively checking the status of a running job, you can just have R tell you when it’s done, if it failed, or what the results are.

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