650 search results for "Knitr"

Practical Data Science with R examples

December 11, 2015
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One of the big points of Practical Data Science with R is to supply a large number of fully worked examples. Our intent has always been for readers to read the book, and if they wanted to follow up on a data set or technique to find the matching worked examples in the project directory … Continue reading...

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Sequential Analysis

December 11, 2015
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Sequential Analysis

We here at Win-Vector LLC been working through an ad-hoc series about A/B testing combining elements of both operations research and statistical points of view. A dynamic programming solution to A/B test design Why does designing a simple A/B test seem so complicated? A clear picture of power and significance in A/B tests Bandit Formulations … Continue reading...

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R tutorials

December 10, 2015
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image02

There are tons of resources to help you learn the different aspects of R, and as a beginner this can be overwhelming. It’s also a dynamic language and rapidly changing, so it’s important to keep up with the latest tools and technologies. That’s why R-bloggers and DataCamp have worked together to bring you a learning path for R. Each section...

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svglite 1.0.0

December 10, 2015
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svglite 1.0.0

I’m pleased to announced a new package for producing SVGs from R: svglite. This package is a fork of Matthieu Decorde RSvgDevice and wouldn’t be possible without his hard work. I’d also like to thank David Gohel who wrote the gdtools package: it solves all the hardest problems associated with making good SVGs from R.

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Wald’s graphical sequential inspection procedure

December 10, 2015
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Wald’s graphical sequential inspection procedure

by John Mount Ph.D. Data Scientist at Win-Vector LLC Our most recent article was a dynamic programming solution to the A/B test problem. Explicitly solving such dynamic programs is a long and tedious process, so you are well served by finding and introducing clever invariants to track (something better than just raw win-rates). This clever idea, called "sequential analysis",...

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Venezuelan Parliamentary Election: What do the Polls Say?

December 5, 2015
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Venezuelan Parliamentary Election: What do the Polls Say?

There is not a huge population of opinion polls covering this parliamentary election in Venezuela, but all I've can be used to gauge the public opinion by the local polling houses. This posting begs an obvious question: how has the mood in Venezuela varied over time with respect to voting intentions for the two political blocs? Next, can we...

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Venezuelan Parliamentary Election: What do the Polls Say?

December 5, 2015
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Venezuelan Parliamentary Election: What do the Polls Say?

There is not a huge population of opinion polls covering this parliamentary election in Venezuela, but all I’ve can be used to gauge the public opinion by the local polling houses. This posting begs an obvious question: how has the mood in Venezuela varied over time with respect to voting intentions for the two political blocs? Next, can we...

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Venezuelan Parliamentary Election: What do the Polls Say?

December 5, 2015
By
Venezuelan Parliamentary Election: What do the Polls Say?

There is not a huge population of opinion polls covering this parliamentary election in Venezuela, but all I’ve can be used to gauge the public opinion by the local polling houses. This posting begs an obvious question: how has the mood in Venezuela varied over time with respect to voting intentions for the two political blocs? Next, can we...

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Exploring Recursive CTEs with sqldf

December 1, 2015
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Exploring Recursive CTEs with sqldf

by Bob Horton Sr. Data Scientist at Microsoft Common table expressions (CTEs, or “WITH clauses”) are a syntactic feature in SQL that makes it easier to write and use subqueries. They act as views or temporary tables that are only available during the lifetime of a single query. A more sophisticated feature is the “recursive CTE”, which is a...

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The R-Podcast Episode 14: Tips and Tricks for using R-Markdown

November 18, 2015
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The R-Podcast is back up and running! In this episode I discuss some useful resources and helpful tips/extensions that have greatly enhanced my work flow in creating reproducible analysis documents via R-Markdown. I also highlight some exciting new endeavors in the R community as well as provide my take on two key events that further

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