2355 search results for "TIME SERIES"

How accurate is Next Bus III: getting the answers

September 16, 2014
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How accurate is Next Bus III: getting the answers

So now that we’ve collected data from the web and wrangled it into something useful, what can we say about how accurate Next Bus is? This post is about the “making of the analysis” … which might be rather boring to those non data geeks (normal people). If you’re just interested in the story and the pictures,...

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Bayes says `don’t worry` about Scotland’s Referendum

September 16, 2014
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Bayes says `don’t worry` about Scotland’s Referendum

Just few hours before Scots head to the polls, there is not an overwhelming advantage of the anti-independence vote. Actually, the margin is shorter than last time I looked at it, but despite such a growing trend in favor of the “Yes” campaign in the last weeks, the “NO” side has an edge still. To frame this in...

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Nuts and Bolts of Quantstrat, Part I

September 8, 2014
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Nuts and Bolts of Quantstrat, Part I

Recently, I gave a webinar on some introductory quantstrat. Here’s the link. So to follow up on it, I’m going … Continue reading →

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Transport Map Book

September 8, 2014
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Transport Map Book

The Transport Map Books are available for each local authority district in England and present a series of maps related to commuting behaviour. The data are derived from multiple sources including: the 2011 Census, Department for Transport estimates and the results of a research project looking at carbon dioxide emissions linked to the...

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Transport Map Book

September 8, 2014
By
Transport Map Book

The Transport Map Books are available for each local authority district in England and present a series of maps related to commuting behaviour. The data are derived from multiple sources including: the 2011 Census, Department for Transport estimates and the results of a research project looking at carbon dioxide emissions linked to the...

Read more »

analyze the world values survey (wvs) with r

September 2, 2014
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a global barometer of public opinion, the world values survey (wvs) clocks in as your best source of cross-cultural moods, attitudes.   you might find its most famous product sweepingly general, but who among us has never ever swept a smidgen of n...

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David Smith, the useR! 2014 Interview

August 25, 2014
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David Smith, the useR! 2014 Interview

“At one point, the only source for daily R news was David Smith’s blog.” —...

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Of Needles and Haystacks: Building an Accurate Statewide Dropout Early Warning System in Wisconsin

August 25, 2014
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Of Needles and Haystacks: Building an Accurate Statewide Dropout Early Warning System in Wisconsin

For the past two years I have been working on the Wisconsin Dropout Early Warning System, a predictive model of on time high school graduation for students in grades 6-9 in Wisconsin. The goal of this project is to help schools and educators have an ea...

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JAGS and Stan

August 24, 2014
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JAGS and Stan

During the last year I have been running some estimations in both JAGS and Stan. In that period I have seen one example where JAGS could not get me decent samples (in the sense of low Rhat and high number of effective samples) but that was data which I...

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Extracting Latent Variables from Rating Scales: Factor Analysis vs. Nonnegative Matrix Factorization

August 21, 2014
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Extracting Latent Variables from Rating Scales: Factor Analysis vs. Nonnegative Matrix Factorization

For many of us, factor analysis provides a gateway to learning how to run and interpret nonnegative matrix factorization (NMF). This post will analyze a set of ratings on a 218 item adjective checklist using both principal axis factor analysis and NMF....

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