704 search results for "SQL"

Making Better DNS TXT Record Lookups With Rcpp

April 25, 2014
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Technically this is Part 2 of Firewall-busting ASN-lookups. However, I said (in Part 1) that Part 2 would be about making a vectorized version and this is absolutely not about that. Rather than fib, I merely misdirect. Moving on… As you can see in Part 1, we have to resort to a system() call to do the TXT record lookup...

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Bandit Formulations for A/B Tests: Some Intuition

April 24, 2014
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Bandit Formulations for A/B Tests: Some Intuition

Controlled experiments embody the best scientific design for establishing a causal relationship between changes and their influence on user-observable behavior. – Kohavi, Henne, Sommerfeld, “Practical Guide to Controlled Experiments on the Web” (2007) A/B tests are one of the simplest ways of running controlled experiments to evaluate the efficacy of a proposed improvement (a new Related posts:

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Preventing escaping in HTML

April 24, 2014
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Preventing escaping in HTML Preventing escaping in HTML library(xtable) ## ## Attaching package: 'xtable'## ## The following objects are masked from 'package:Hmisc':## ## label, label<- library(stringr)library(whisker) Problem statementBeing a novice in R language, the problem I faced maight be a novice one,...

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Mythbusting – Dr. Copper

April 21, 2014
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Mythbusting – Dr. Copper

Image by Justin Reznick   “An economist is an expert who will know tomorrow why the things he predicted yesterday didn't happen today.” Laurence J. Peter (author and creator of the Peter Principle) If you were paying attention to financial sites last month, you probably noticed a number of articles on “Dr. Copper”. Here is

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Using R — Working with Geospatial Data (and ggplot2)

April 16, 2014
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Using R — Working with Geospatial Data (and ggplot2)

This is a follow-up blog-post to an earlier introductory post by Steven Brey: Using R: Working with Geospatial Data. In this post, we’ll learn how to plot geospatial data in ggplot2. Why might we want to do this? Well, it’s really …   read more ...

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Oracle’s Strategy for Advanced Analytics

April 15, 2014
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At Oracle our goal is to enable you to get timely insight from all of your data. We continuously enhance Oracle Database to allow workloads that have traditionally required extracting data from the database to run in-place. We do this to narrow the ga...

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The ins and outs of interacting with web APIs

April 14, 2014
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We've received a number of questions from our users about dealing with the finer details of data sources on the web. Whether you're reading data from local storage such as a csv file, a .Rdata store, or possibly a proprietary file format, you've most likely run into some issues in the past. Common problems include passing incorrect paths, files...

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BARUG talks highlight R’s diverse applications

April 10, 2014
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BARUG talks highlight R’s diverse applications

by Joseph Rickert The seven lightning talks presented to the Bay Area useR Group on Tuesday night were not only really interesting (in some cases downright entertaining) in their own right, but they also illustrated the diversity of R applications, and the extent to which R has become embedded in the corporate world. Two presentations with a whimsical touch...

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Functional programming in R

Functional programming in R

Functional programming in R This post is based on a talk I gave at the Manchester R User Group on functional programming in R on May 2nd 2013. The original slides can be found here This post is about functional programming, why it is at the heart of the R language and how it can hopefully help you...

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Seven quick facts about R

April 2, 2014
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I've been spending the week at the Gartner Business Intelligence and Analytics Summit in Las Vegas, and R has been quite prominent here. Of course, R got namechecked several times on the panel about the Gartner Magic Quadrant for Advanced Analytics, and several of the regular talks mentioned R as well. I gave a short presentation on R and...

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