2738 search results for "GIS"

My Goodness. What a Fat Dataset!

October 25, 2012
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My Goodness.  What a Fat Dataset!

Recently at work we got sent a data file containing information on donations to a specific charitable organization, ranging all the way back to the 80′s.  Usually, when we receive a dataset with a donation history in it, each row … Continue reading →

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Palettes in R

October 25, 2012
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Palettes in R

In its simplest form, a palette in R is simply a vector of colors. This vector can be include the hex triplet or R color names.The default palette can be seen through palette(): > palette("default") # you'll only need this line if you've previ...

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Congressional ideology by state

October 25, 2012
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Congressional ideology by state

In a recent post, I illustrated how to add a background geom to your ggplot. While that code worked, and the plot looked fine, it was pointed out to me that I was missing an important aspect of plot layering with ggplot2. Namely, it is not, as I previ...

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Plotting the debate "Winner"

October 24, 2012
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Plotting the debate "Winner"

As a Political Scientist, it could not be more gauche to talk about the Presidential debate in terms of a winner and a loser, but the occasion provides the opportunity to show how to do (at least) three really useful things: Directly load price and v...

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Stan for Bayesian Analysis

October 23, 2012
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Stan for Bayesian Analysis

Bayesian analysis has been growing in popularity among ecologists recently, largely due to accessible books such as Models for Ecological Data: An Introduction, Introduction to WinBUGS for Ecologists, and Bayesian Methods for Ecology. Most ecologists with limited programming background have … Continue reading →

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Machine learning for hackers

October 23, 2012
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Machine learning for hackers

Which way do you prefer to learn a new material – deep theoretical background first and practice later or do you like to break things in order to fix them? If latter is your way of learning things, then most likely you will enjoy Machine Learning for Hackers. The book has chapters on machine learning

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Two Talks on Data Science, Big Data and R

October 23, 2012
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On Thursday next week (November 1), I'll be giving a new webinar on the topic of Big Data, Data Science and R. Titled "The Rise of Data Science in the Age of Big Data Analytics: Why Data Distillation and Machine Learning Aren’t Enough", this is a provocative look at why data scientists cannot be replaced by technology, and why...

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Benchmarking matrix creation

October 23, 2012
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Benchmarking matrix creation

Sometimes it is useful to take a vector, or one column/row of a matrix, and build a new matrix of identical copies of that vector. There are lots of different ways to do this, but I just discovered a new, and very straightforward way to do this with m...

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It Takes 2 Lines of R Code to Discover Interesting Biology

October 23, 2012
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It Takes 2 Lines of R Code to Discover Interesting Biology

The following biological phenomenon demonstrates just how elegant R code can be. In vertebrate genomes, a methyl group (-CH3) can be added to nucleotides. Such process of methylation is commonly associated with gene suppression. Most of the cytosines in the … Continue reading →

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googleVis 0.3.0/0.3.1 is released: It’s faster!

October 23, 2012
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googleVis 0.3.0/0.3.1 is released: It’s faster!

Version 0.3.0 of the googleVis package for R has been released on CRAN on 20 October 2012. With this version we have been able to speed up the code considerably. The transformation of R data frames into JSON works significantly faster. The execution of the gvisMotionChart function in the World Bank demo is over 35 times...

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