2614 search results for "GIS"

R Beginner’s Guide Book Update 4/28/2010

April 28, 2010
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R Beginner’s Guide Book Update 4/28/2010

Update: Statistical Analysis with R is now available!I am writing to update you on the progress of my R Beginner's Guide book, which is to be published through Packt. I have really gotten to work over the past couple months and have recently completed ...

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Some LaTeX Gems – Part 1: TikZ, Loops and more

April 23, 2010
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Some LaTeX Gems – Part 1: TikZ, Loops and more

This logo means that the blog post is about something I have found interesting, but does not apply directly to the exact purpose of this blog. Note: These commands have been tested in pdflatex. I am not sure if they work in other distributions. Over the past couple of months, I have been assisting with editing some papers and also doing...

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Free Video Courses on R, Structural Equation Modelling, Causal Inference, and Regression from Uni Jena

April 22, 2010
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Free Video Courses on R, Structural Equation Modelling, Causal Inference, and Regression from Uni Jena

The Department of methodology and Evaluation Research at Universität Jena has made available a set of free online video courses on data analysis.They cover topics that are particularly relevant to psychology and social science researchers, including ...

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Parallel Multicore Processing with R (on Windows)

April 21, 2010
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Parallel Processing backend for R under windows - installation tips and some examples.

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Experiments with igraph

April 21, 2010
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Experiments with igraph

Networks – social and biological – are all the rage, just now. Indeed, a recent entry at Duncan’s QOTD described the “hairball” network representation as the dominant cultural icon in molecular biology. I’ve not had occasion to explore networks “professionally”, but have always been fascinated by both networks and the tools used to analyse them.

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Simulating Dart Throws in R

April 16, 2010
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Back in November 2009 Wired wrote an article about some grad students who decided to try to stochastically model throwing darts. Because I don’t actually read printed material I didn’t see the article until a couple of months ago. My immediate thought was, “hey, I drink beer. I throw darts. I build stochastic models. Why

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An article attacking R gets responses from the R blogosphere – some reflections

April 16, 2010
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An article attacking R gets responses from the R blogosphere – some reflections

In this post I reflect on the current state of the R blogosphere, and share my hopes for the future

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R is an Epic Fail?

April 15, 2010
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I came across this blog post just now: The Next Big Thing, and of course these words caught my attention: However, for me personally and for most users, both individual and organizational, the much greater cost of software is the time it takes to install it, maintain it, learn it and document it. On

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I’d be more than happy with the unlinked data web

April 14, 2010
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I’d be more than happy with the unlinked data web

Visit this URL and you’ll find a perfectly-formatted CSV file containing information about recent earthquakes. A nice feature of R is the ability to slurp such a URL straight into a data frame: quakes <- read.csv("http://neic.usgs.gov/neis/gis/qed.asc", header = T) colnames(quakes) # "Date" "TimeUTC" "Latitude" "Longitude" "Magnitude" "Depth" # number of recent quakes nrow(quakes) #

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Cherry Picking to Generalize ~ NASA Global Temperature Trends ~ enhanced w/ ggplot2

April 12, 2010
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Cherry Picking to Generalize ~ NASA Global Temperature Trends ~ enhanced w/ ggplot2

In a prior article, I tried to visualize the linear global temperatures trends for a grid of start and end years. The visual I created was confusing in that the specification of color scale was interdependent with the data values. I wanted a blue -> white -> red scale of the temperatures indicating cool ->

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