818 search results for "MAPS"

Free e-book on Data Science with R

February 22, 2013
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Free e-book on Data Science with R

A new book by Jeffrey Stanton from Syracuse Iniversity School of Information Studies, An Introduction to Data Science, is now available for free download. The book, developed for Syracuse's Certificate for Data Science, is available under a Creative Commons License as a PDF (20Mb) or as an interactive eBook from iTunes. The book begins with the following clear definition...

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Mapped: Twitter Languages in New York

February 20, 2013
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Mapped: Twitter Languages in New York

Following the interest in our Twitter Tongues map for L

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Sketches Around Twitter Followers

February 19, 2013
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Sketches Around Twitter Followers

I’ve been doodling… Following a query about the possible purchase of Twitter followers for various public figure accounts (I need to get my head round what the problem is with that exactly?!), I thought I’d have a quick look at some stats around follower groupings… I started off with a data grab, pulling down the

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Data fishing: R and XML part 3

February 18, 2013
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Data fishing: R and XML part 3

I’ve recently posted two blogs about gathering data from web pages using functions in R. Both examples showed how we can create our own custom functions to gather data about Minnesota lakes from the Lakefinder website. The first post was an example showing the use of R to create our own custom functions to get

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Automatic spatial interpolation with R: the automap package

February 17, 2013
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Automatic spatial interpolation with R: the automap package

In case of continuously collected data, e.g. observations from a monitoring network, spatial interpolation of this data cannot be done manually. Instead, the interpolation should be done automatically. To achieve this goal, I developed the automap package. automap builds on… See more ›

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The Problem with Testing for Heteroskedasticity in Probit Models

February 12, 2013
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The Problem with Testing for Heteroskedasticity in Probit Models

A friend recently asked whether I trusted the inferences from heteroskedastic probit models. I said no, because the heteroskedastic probit does not allow a researcher to distinguish between non-constant variance and a mis-specified mean function. In particular, my friend had a hypothesis that the variance of the latent outcome (commonly called "y-star") should increase with an

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More visualisation of 2012 NFL Quarterback performance with R

February 12, 2013
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More visualisation of 2012 NFL Quarterback performance with R

In last week’s post I used R heatmaps to visualise the performance of NFL Quarterbacks in 2012. This was done in a 2 step process, Clustering QB performance based on the 12 performance metrics using hierarchical clustering Plotting the performance clusters using R’s pheatmap library An output from the step 1 is the cluster dendrogram

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Data Visualization: Graphics with GGPlot2

February 8, 2013
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Data Visualization: Graphics with GGPlot2

By: Sean M. Gonzalez  Basic plots in R using standard packages like lattice work for most situations where you want to see trends in small data sets, such as your simulation variables, which make sense considering lattice began with the Bell … Continue reading → The post Data Visualization: Graphics with GGPlot2 appeared first on Data Community DC.

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2011 Census Open Atlas Project

February 5, 2013
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2011 Census Open Atlas Project

This month has seen the release of the 2011  census data for England and Wales at Output Area Level. This offers the possibility to map various attributes about people and places for very small geographic areas. Output Areas represent the most detailed geography for which Census data are released and are the building blocks for

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2011 Census Open Atlas Project

February 5, 2013
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2011 Census Open Atlas Project

This month has seen the release of the 2011  census data for England and Wales at Output Area Level. This offers the possibility to map various attributes about people and places for very small geographic areas. Output Areas represent the most detailed geography for which Census data are released and are the building blocks for many popular products...

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