2650 search results for "gis"

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
By

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 ...

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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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plyr’s idata.frame VS. data.frame

May 13, 2011
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plyr’s idata.frame VS. data.frame

I had seen the function idata.frame in plyr before, but not really tested it. Here are a few comparisons of operations on normal data frames and immutable data frames. Immutable data frames don't work with the doBy package, but do work with aggregate i...

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Kaggle Competition Walkthrough: Fitting a model

May 12, 2011
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Kaggle Competition Walkthrough: Fitting a model

Now that we've got the data we need into R, it is very easy to fit a model using the caret package. Caret's workhorse function is called 'train,' and it allows you to fit a wide variety of models using the same syntax. Furthermore, many models have '...

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