2691 search results for "Twitter"

ABC [PhD] course

January 25, 2012
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ABC [PhD] course

As mentioned in the latest post on ABC, I am giving a short doctoral course on ABC methods and convergence at CREST next week. I have now made a preliminary collection of my slides (plus a few from Jean-Michel Marin’s), available on slideshare (as ABC in Roma, because I am also giving the course in

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RStudio v0.95 Released

January 25, 2012
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RStudio v0.95 Released

The final version of RStudio v0.95 is now available for download from our website (thanks to everyone who put the preview release through its paces over the last couple of weeks!). Highlights of the new release include: Projects — A new system for managing R projects that enables easy switching between working directories and per-project contexts

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CBC Reviews: Revolution R (in which this doesn’t go well)

January 24, 2012
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CBC Reviews: Revolution R (in which this doesn’t go well)

Update!: The latest version of Revolution R, which added support for RHEL 6, appears to work (it appears to at least install, run, and perform basic tasks). See this post for more details. I’ve come to enjoy using R. I had dabbled with it in the past, but found it painfully opaque, and the Effort:Reward

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Time Series Matching with Dynamic Time Warping

January 20, 2012
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Time Series Matching with Dynamic Time Warping

THIS IS NOT INVESTMENT ADVICE. The information is provided for informational purposes only. In the Time Series Matching post, I used one to one mapping to the compute distance between the query(current pattern) and reference(historical time series). Following chart visualizes this concept. The distance is the sum of vertical lines. An alternative way to map

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Connect to the Facebook API with R for Windows Users

January 19, 2012
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Recently there have been some great posts that highlight how easy it is to hook into the Facebook Graph API using R. Crawling Facebook with R started the discussion and Apply R highlighted how easy it was to plot our network. In order to replicate the examples on Windows, most likely you will need to

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Winning from losing

January 19, 2012
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Winning from losing

By following twitter’s #rstats hashtag (rss feed), I recently came across a very interesting R-related blog: datanalytics.com. The first post I read from it was about setting up an on-line reading group to go through the excellent “The Elements of … Continue reading →

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Visualize your Facebook friends network with R

January 19, 2012
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Visualize your Facebook friends network with R

A few days ago, Romain François explained how to interface with the Facebook Graph API explorer with R. This was a low-level interface, giving the R programmer the ability to the raw data that Facebook can provide about your connections. Now, just four days later, the first application in R (that I know of) based on the Facebook Graph...

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non-stationary AR(10)

January 18, 2012
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non-stationary AR(10)

In the revision of Bayesian Core on which Jean-Michel Marin and I worked together most of last week, having missed our CIRM break last summer (!), we have now included an illustration of what happens to an AR(p) time series when the customary stationarity+causality condition on the roots of the associated polynomial is not satisfied. 

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Running R2WinBUGS on a Mac Running OSX

January 18, 2012
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I have long used JAGS to do all of my Bayesian work on my mac. Early on, I tried to figure out how to install WinBUGS and OpenBUGS and their accompanying R libraries on my mac, but, to no avail. I just had too hard of a time getting them running and gave up. But,

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Gold price and fear

January 18, 2012
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Gold price and fear

Via @theEconomist, I understood that there might be connections between the price of Gold (which is said to be extremely high nowadays) and the VIX SP500 index (the option volatility index, i.e. the so-called "fear index", as discussed - in French-...

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