2079 search results for "ggplot"

Marketing Mix Lab: Multicollinearity and Ridge Regression

January 12, 2012
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Marketing Mix Lab: Multicollinearity and Ridge Regression

In marketing mix modelling you have to be very lucky not to run into problems with multicollinearity. It’s in the nature of marketing campaigns that everything tends to happen at once: the TV is supported by radio, both are timed to coincide with the relaunch of the website. One of the techniques that is often … Continue reading...

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Toying with Google Apps Script

January 11, 2012
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Toying with Google Apps Script

Google offers an access to its services with Apps Scripts (JavaScript). That gives you a possibility to connect your spreadsheet to a fascinating variety of tools like geocoder, stock info, language translator, or email.My java-scri...

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How big is my dog going to get? A regression analysis with R

January 10, 2012
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How big is my dog going to get? A regression analysis with R

The dog on the left is named Maya. She is a labrador retriever (field line), weighs 18 kilograms and is currently eight months old. My girlfriend and I carry the dog several times a day high in the fourth floor. … Weiterlesen →

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Coming of Age: R and Spatial Data Visualisation

January 10, 2012
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Coming of Age: R and Spatial Data Visualisation

I have been using R (a free statistics and graphics sof

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Presenting results of logistic regression

January 10, 2012
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Presenting results of logistic regression

So my advisor pointed out this 'new' (well, 2004), way of plotting results of logistic regression results. The idea was presented in a 2004 Bulletin of the Ecological Society of America issue (here). I tried to come up with a solution using, what el...

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Presenting results of logistic regression

January 10, 2012
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Presenting results of logistic regression

So my advisor pointed out this 'new' (well, 2004), way of plotting results of logistic regression results. The idea was presented in a 2004 Bulletin of the Ecological Society of America issue (here). I tried to come up with a solution using, what el...

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Honing Your R Skills for Job Interviews

January 9, 2012
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Honing Your R Skills for Job Interviews

My time as a grad student will soon draw to a close. With this comes the terrifying realisation that I'm going to start applying for jobs and, hopefully, interviewing soon, forever leaving my comfortable security blanket of academia. With that horrible thought in mind, I've been doing some poking around to see what various kinds of technical interviews are...

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Mapping the Iowa caucus results: how it’s done with R

January 6, 2012
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Mapping the Iowa caucus results: how it’s done with R

If you've been following the presidential primary process here in the US, you've probably seen many maps of the results of the Iowa caucuses by now (such as this infamous one from Fox News). But you might be interested to learn how such maps can be made using the R language. The Offensive Politics blog explains the process in...

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getting ICES 1903-1949 catch statistics into R

January 5, 2012
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getting ICES 1903-1949 catch statistics into R

in the last post i showed how to get the nominal north east atlantic landings data from 1950 onwards into a usable format in R. this time around a script that shows how to import zipped excel files from 1903 to 1949 is provided. finalizing with a ggplo...

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Mapping the Iowa GOP 2012 Caucus Results

January 4, 2012
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Mapping the Iowa GOP 2012 Caucus Results

Introduction On Tuesday January 3rd 2012 the Iowa Republican party held it’s presidential caucuses, with Mitt Romney beating Rick Santorum by 8 votes as of noon on Jan 4th. This was an exciting race with multiple lead changes and entrance polling showing many late undecideds and large gaps in candidate support by age and income.

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