Monthly Archives: August 2014

Data science goes to college with DataFest

August 6, 2014
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Data science goes to college with DataFest

Below is the first of several exciting data science developments for the younger generation, happening...

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A quiz on magrittr: How many scores can you get?

August 6, 2014
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Here is a quiz on magrittr and you may check if you are really good at using it. Since the CRAN version currently does not support nested ., it won't be interesting to make a quiz on that version. All the following examples are using the latest development version on GitHub. You can do the same test with the...

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A New Use for Pipes in R: Forkbombs

August 6, 2014
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Almost 3 years ago, I wrote about how to forkbomb with R. A quick recap is that a forkbomb is a low-tier, malicious misuse of a system; sort of a "baby's first denial of service". The idea is that you write a program that will start an entirely new copy of itself each time it is executed. Executing it...

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In case you missed it: July 2014 Roundup

August 6, 2014
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In case you missed them, here are some articles from June of particular interest to R users: The deadline for our contest to visualize the location of R user groups has been extended to August 16. Previews of R-related sessions at this year's JSM conference in Boston. Coding errors in R graphics scripts serendipitously create some interesting art. Another...

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Predicting Monthly Car Sales for Brands in US: First Step

August 6, 2014
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I've set out to produce monthly forecasts of monthly car sales by brand in the US. So far I've made a SUTSE dynamic linear model (code on Github) and created a Shiny app (http://sweiss.shinyapps.io/carvis/) as a prototype (no predictions...

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NCEAS Codefest

August 6, 2014
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We're delighted to be sponsoring the upcoming Open Science Codefest in Santa Barbara, California, alongside RENCI, NCEAS, NSF, DataONE, and Mozilla Science Lab. The Open Science Codefest's goal is to gather researchers from across ecology, biodiversity science, and other earth and environmental sciences with programmer types to collaborate on coding projects. The ideas for the event so far...

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Results of the Readers’ Survey

August 5, 2014
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Results of the Readers’ Survey

 First of all, let me say “Thank You” to all of the 357 people who completed the survey. I was hoping for 100, so needless to say the response blew away my expectations. This endeavor seems like a worthwhile effort to do once a year. Next year I will refine the questionnaire based on what I've...

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New freqparcoord Example

August 5, 2014
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New freqparcoord Example

In my JSM talk this morning, I spoke about work done by Yingkang Xie and myself, on a novel approach to the parallel coordinates method of visualization.  I’ve made several posts to this blog in the past on freqparcoord, our implemention of our method. My talk this morning used some recently-available NYC taxi data.  You

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Introducing rlist 0.3

August 5, 2014
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rlist 0.3 is released! This package now provides a wide range of functions for dealing with list objects. It can be especially useful when they are used to store non-tabular data. Two notable features are added in this version. First, list.search and equal() are added in support of fuzzy filtering and searching. Second, List object is added to provide object-based,...

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When life gives you coloured cells, make categories

August 5, 2014
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When life gives you coloured cells, make categories

Let’s start by making one thing clear. Using coloured cells in Excel to encode different categories of data is wrong. Next time colleagues explain excitedly how “green equals normal and red = tumour”, you must explain that (1) they have sinned and (2) what they meant to do was add a column containing the words

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