3904 search results for "GIS"

Effective Applications of the R Language Conference 2014

September 19, 2014
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Effective Applications of the R Language Conference 2014

By Chris Campbell – Senior Consultant, UK. What struck me first was how few sandals I could see, none of which were paired with socks. The energy in the room was electric as introductions were made and business cards were exchanged. … Continue reading →

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Comparing machine learning models in R

September 18, 2014
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Comparing machine learning models in R

by Joseph Rickert While preparing for the DataWeek R Bootcamp that I conducted this week I came across the following gem. This code, based directly on a Max Kuhn presentation of a couple years back, compares the efficacy of two machine learning models on a training data set. #----------------------------------------- # SET UP THE PARAMETER SPACE SEARCH GRID ctrl <-...

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Migrating Table-oriented Web Scraping Code to rvest w/XPath & CSS Selector Examples

September 17, 2014
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I was offline much of the day Tuesday and completely missed Hadley Wickham’s tweet about the new rvest package: Are you an #rstats user who misses python's beautiful soup? Please try out rvest (http://t.co/PeiIHr3jDW) and let me know what you think.— Hadley Wickham (@hadleywickham) September 12, 2014 My intrepid colleague (@jayjacobs) informed me of this (and didn’t...

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Bayes says “don’t worry” about Scotland’s Referendum

September 17, 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 … Read More...

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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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3D Sine Wave

September 16, 2014
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3D Sine Wave

Had a headache last night, so decided to take things easy and just read posts Google+. Then I came across this post which seems interesting so I thought I would play around before I head to bed. ...

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how to provide a variance calculation on your public-use survey data file without disclosing sampling clusters or violating respondent confidentiality

September 16, 2014
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this post and accompanying syntax would not have been possible without dan oberski.  read more, find out why.  thanks dan.dear survey administrator: someone sent you this link because you work for an organization or a government agency that c...

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Using Reddit’s JSON API to analyze post popularity

September 15, 2014
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Using Reddit’s JSON API to analyze post popularity

Graduate student Clay McLeod decided to find out what makes a post on the social-sharing site Reddit popular. These are the questions he seeks to answer: What’s in a post? Reddit pulls in around 115 million unique visitors each month, amassing a staggering 5 billion page views per month. For a long time, I’ve wondered what factors draw people...

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How do you say π^π^π?

September 15, 2014
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How do you say π^π^π?

Well, not that you really probably want to know how to say such an absurdly large number. However for those of you who are interested (allowing for rounding) it is:one quintillion, three hundred forty quadrillion, one hundred sixty-four trillion, one h...

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One datavis for you, ten for me

September 14, 2014
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One datavis for you, ten for me

Over the years of my graduate studies I made a lot of plots. I mean tonnes. To get an extremely conservative estimate I grep’ed for every instance of “plot(” in all of the many R scripts I wrote over the past five years. The actual number is very likely orders of magnitude larger as 1) many

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