3905 search results for "GIS"

Six of One (Plot), Half-Dozen of the Other

July 24, 2014
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Six of One (Plot), Half-Dozen of the Other

This is a guest post by Randy Zwitch (@randyzwitch), a digital analytics and predictive modeling consultant in the Greater Philadelphia area. Randy blogs regularly about Data Science and related technologies at http://randyzwitch.com. He’s blogged at Bad Hessian before here. For those of you with WordPress blogs and have the Jetpack Stats module installed, you’re intimately familiar… Continue reading →

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What shall we talk about at ESA?

July 24, 2014
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What shall we talk about at ESA?

ESA is just around the corner, and many of us are gearing up and trying to figure out a schedule to cover all the talks and people we can pack in. ESA is a big conference and there’s far too much for any one person to see. In the end, everyone experiences a different...

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再不相信预编译的R

July 23, 2014
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去年ubuntu下apt-get了R-3.0.2, 用了没多久就发现了system命令有问题,通常情况下调用系统命令是正常的,但是我调用bowtie的时候,就会报错: Warning: Could not open read file "/tmp/8156.inpipe1" for reading; skipping... Read More: 2553 Words Totally

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Coherent population forecasting using R

July 23, 2014
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Coherent population forecasting using R

This is an example of how to use the demography package in R for stochastic population forecasting with coherent components. It is based on the papers by Hyndman and Booth (IJF 2008) and Hyndman, Booth and Yasmeen (Demography 2013). I will use Australian data from 1950 to 2009 and forecast the next 50 years. In demography, “coherent” forecasts are...

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Making random draws from an arbitrarily defined pdf

July 23, 2014
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Making random draws from an arbitrarily defined pdf

I recently found myself in need of a function to sample randomly from an arbitrarily defined probability density function. An excellent post by Quantitations shows how to accomplish this using some of Rs fairly sophisticated functional approximation to...

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Estimating the area under a curve using random points in R

July 23, 2014
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Estimating the area under a curve using random points in R

Even though this post is not the first one on this blog, the code I used to estimate the area under the curve x^2 and posted below is one of my first attempts to code something "complicated" with R. It has been more than 5 months since I wrote it, it d...

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Simulate data with R

July 23, 2014
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Simulate data with R

Last semester I was attending a boring class, even though the professor was really clever, he was always bouncing around the main theme and never got straight to the point. While thinking about everything but the class, I had an idea: when you are give...

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The Monty Hall problem

July 20, 2014
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The Monty Hall problem

The Monty Hall problem is a famous game which was played in the television show "Let's make a deal".The game goes like this:There are three doors, behind each door there is either a goat or an amazing sportcar. The contestant wins if they guess where t...

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Weekly Variability Simulation of Fantasy Football Projections

July 20, 2014
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Weekly Variability Simulation of Fantasy Football Projections

In this post, I show how to estimate players’ week-to-week variability in fantasy football points.  In a prior post, I demonstrated how to calculate a player’s risk level, as defined The post Weekly Variability Simulation of Fantasy Football Projections appeared first on Fantasy Football Analytics.

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The Rise and Fall of the name Jennifer

July 19, 2014
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The Rise and Fall of the name Jennifer

A recent fascinating post by Analysis at Large got me interested in naming trends analysis. The original post used Social Security data by state to map out the more frequent names by state. While this sounded interesting it turned out a single name (yo...

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