2722 search results for "gis"

Porting Stata-like Marginal Effects to LaTeX

May 19, 2011
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Porting Stata-like Marginal Effects to LaTeX

The TimeSeriesIreland Blog posted an excellent start on a function that automatically computes marginal effects for probit and logit models. As I have always wanted an easy-to-use function that computes and reports marginal effects in R, I was elated ...

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Stata-like Marginal Effects for Logit and Probit Models in R

May 17, 2011
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Stata-like Marginal Effects for Logit and Probit Models in R

Although this blog’s primary focus is time series, one feature I missed from Stata was the simple marginal effects command, ‘mfx compute’, for cross-sectional work, and I could not find an adequate replacement in R. To bridge this gap, I’ve written a (rather messy) R function to produce marginal effects readout for logit and probit

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A simple function for plotting phylogenies in ggplot2

May 17, 2011
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A simple function for plotting phylogenies in ggplot2

I wrote a simple function for plotting a phylogeny in ggplot2. However, it only handles a 3 species tree right now, as I haven't figured out how to generalize the approach to N species.Any ideas on how to improve this?

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R tips from around the web…

May 17, 2011
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The great thing of R, is that the number of available resources on the web is increasing dramatically. If you cannot afford expensive books, or you are looking straight questions or some tutorials you will find almost anything you need. Here's my short...

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R tips from around the web…

May 17, 2011
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The great thing of R, is that the number of available resources on the web is increasing dramatically. If you cannot afford expensive books, or you are looking straight questions or some tutorials you will find almost anything you need. Here's my short...

Read more »

Describing Data: Frequently Used Commands

May 13, 2011
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Describing Data: Frequently Used Commands

Obtaining a coherent numerical summary of data is a common task, and it is common to want to port these summary statistics into a table of results. When I am in interactive mode with my data, I use the summary() command applied to my data frame. For ...

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Describing Data: Frequently Used Commands

May 13, 2011
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Describing Data: Frequently Used Commands

Obtaining a coherent numerical summary of data is a common task, and it is common to want to port these summary statistics into a table of results. When I am in interactive mode with my data, I use the summary() command applied to my data frame. For ...

Read more »

Because it’s Friday: French Press Heat Retention

May 13, 2011
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Because it’s Friday: French Press Heat Retention

While responding to this thread on Reddit I made a rough guess as to the heat retention of my french press when completely full of coffee. When I went to bed I realized there was no good reason why I … Continue reading →

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Review of 2011 Data Scientist Summit

May 13, 2011
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Review of 2011 Data Scientist Summit

Some time over the past 6 weeks I randomly saw a tweet announcing the “Data Scientist Summit” and shortly below it I saw that it would be held in Las Vegas at the Venetian. Being a Data Scientist myself is reason enough to not pass up this opportunity, but Vegas definitely sweetens the deal! On Wednesday I woke up...

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Reflections on Data Science Summit 2011

May 13, 2011
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The Data Science Summit held in Las Vegas this week was outstanding - kudos and thanks to EMC/Greenplum for organizing the event. The energy of 150+ data scientists coupled with a well-curated agenda of talks created a real sense of being at the cusp of a real revolution in the applications of data analysis. Here are just a few...

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