2678 search results for "gis"

Using R to graph a subject trend in PubMed

May 15, 2012
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Using R to graph a subject trend in PubMed

The traditional way to show that your topic is worth studying in front of an audience is to show the state of the field based on a literature review. This is especially true if your subject is obscure except to a handful of scientists in the world.I was confronted with this problem more than once and the last time...

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Interactive reports in R with knitr and RStudio

May 15, 2012
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Interactive reports in R with knitr and RStudio

Last Saturday I met the guys from RStudio at the R in Finance conference in Chicago. I was curious to find out what RStudio could offer. In the past I have used mostly Emacs + ESS for editing R files. Well, and what a surprise it was. JJ, Joe and Josh ...

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Skew of Bonds

May 15, 2012
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Skew of Bonds

As the researchpuzzler highlights in “a bad bet”, US bonds were a popular subject at the CFA Institute Annual Conference.  While US Bonds have been in an amazing 30 year run (see previous posts Lattice Explore Bonds, Bond Market as a Casino Ga...

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Plotting data and distribution simultaneously (with ggplot2)

May 14, 2012
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Plotting data and distribution simultaneously (with ggplot2)

Ever wanted to see at a glance the distribution of your data across different axes? It happens often to me, and R allows to build a nice plot composition - This is my latest concoction. I used ggplot2 here, but equivalent graphics can be made...

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New courses from R gurus

May 14, 2012
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Looking to learn R, or to expand your R skills for data visualization or package development? Here are some R courses presented by the experts you may be interested in: June 19-20: Visualization in R with ggplot2. This course presented by Garrett Grolemund & Dr. Winston Chang of Rice University is also a web-based course with live presentation. This...

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gRaphics! 2012-05-12 14:07:00

May 12, 2012
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gRaphics! 2012-05-12 14:07:00

My own version of bubble plot (part 1)During one of my projects, I found myself in need of visualizing more than 3 dimensions at once. Three-dimensional graphs are not a good solution, usually - they will need to be properly oriented, for a start, ad that's tricky.So, I started looking at bubble plots. The size of the bubble can...

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Criticism 2 of NHST: NHST Conflates Rare Events with Evidence Against the Null Hypothesis

May 12, 2012
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Introduction This is my second post in a series describing the weaknesses of the NHST paradigm. In the first post, I argued that NHST is a dangerous tool for a community of researchers because p-values cannot be interpreted properly without perfect knowledge of the research practices of other scientists — knowledge that we cannot hope

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Heartbeat of a Cycling City: Bixi data at Hack/Reduce

May 8, 2012
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Heartbeat of a Cycling City: Bixi data at Hack/Reduce

The recent Hack/Reduce hackathon in Montreal was a tonne of fun. Our team tackled a data set of consisting of Bixi (Montreal’s bicycle share system) station states at one minute temporal resolution. We used Hadoop and mapreduce to pull out some features of user behaviours. One of the things we extracted was the flux at

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useR! 2012 – DEADLINE FAST APPROACHING!

May 7, 2012
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useR! 2012 – DEADLINE FAST APPROACHING!

DEADLINE FAST APPROACHING – 8th Annual International R User Conference useR! 2012, Nashville, Tennessee USA Registration Deadlines: Early Registration: Passed Regular Registration: Mar 1- May 12 Late Registration: May 13 – June 4 On-Site Registration: June 12 – June 15 Please note: Nashville is offering several large entertainment events the month of June, and hotels are quickly selling out....

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Bivariate linear mixed models using ASReml-R with multiple cores

May 7, 2012
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Bivariate linear mixed models using ASReml-R with multiple cores

A while ago I wanted to run a quantitative genetic analysis where the performance of genotypes in each site was considered as a different trait. If you think about it, with 70 sites and thousands of genotypes one is trying … Continue reading →

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