6634 search results for "git"

The data.table Cheat Sheet

November 24, 2014
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The data.table Cheat Sheet

The data.table package provides an enhanced version of data.frame that allows you to do blazing fast data manipulations. data.table is being used in different fields such as finance and genomics, and is especially useful for those of you that are working with large data sets (e.g. 1GB to 100GB in RAM). Although its typical syntax structure is not The post

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Twitter’s R package for detecting breakouts in time series

November 24, 2014
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Twitter’s R package for detecting breakouts in time series

With so many more devices and instruments connected to the "Internet of Things" these days, there's a whole lot more time series data available to analyze. But time series are typically quite noisy: how do you distinguish a short-term tick up or down from a true change in the underlying signal? To solve this problem, Twitter created the BreakoutDetection...

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rvest: easy web scraping with R

November 24, 2014
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rvest: easy web scraping with R

rvest is new package that makes it easy to scrape (or harvest) data from html web pages, by libraries like beautiful soup. It is designed to work with magrittr so that you can express complex operations as elegant pipelines composed of simple, easily understood pieces. Install it with: install.packages("rvest") rvest in action To see rvest

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GTrendsR package to Explore Google trending for Field Dependent Terms

November 24, 2014
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GTrendsR package to Explore Google trending for Field Dependent Terms

My friend, Steve Simpson, introduced me to Philippe Massicotte and Dirk Eddelbuettel’s GTrendsR GitHub package this week. It’s a pretty nifty wrapper to the Google Trends API that enables one to search phrase trends over time. The trend indices that … Continue reading →

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Slides of keynote speeches, tutorials and panelist presentations at IEEE Big Data 2014

November 23, 2014
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Slides of keynote speeches, tutorials and panelist presentations at IEEE Big Data 2014

Slides of keynote speeches, tutorials and panelist presentations at the 2014 IEEE International Conference on Big Data can be found at the conference website at links below. (1) Keynote speech http://cci.drexel.edu/bigdata/bigdata2014/keynotespeech.htm - Never-Ending Language Learning, Tom Mitchell – E. Fredkin … Continue reading →

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When should I change to snow tires in Netherlands

November 23, 2014
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When should I change to snow tires in Netherlands

The Royal Netherlands Meteorological Institute has weather information by day for a number of Dutch stations. In this post I want to use those data for a practical problem: when should I switch to winter tires? (or is that snow tires? In any case nails...

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proper use of GOSemSim

November 22, 2014
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proper use of GOSemSim

One day, I am looking for R packages that can analyze PPI and after searching, I found the ppiPre package in CRAN. The function of this package is not impressive, and I already knew some related works, including http://intscore.molgen.mpg.de/. The authors of this webserver contacted me for the usages of GOSemSim when they developing it. Read more »

Nov 20 Data Science Talklet: Incorporating Text Data into Your Feature Set

November 22, 2014
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As promised, here are the slides and notes from my DSDC talklet on strategies for incorporating text data into the feature set of a predictive model. Slides Notes github Thanks to Harlan for asking, and to Dan and David for...

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Simulating scientists doing experiments

November 22, 2014
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Following a discussion on Gelman's blog, I was playing around with simulating scientists looking for significant effects. Suppose each of 1000 scientists run 200 experiments in their lifetime, and suppose that 20% of the experiments are such that the n...

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Flowers/Fractals

November 21, 2014
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Flowers/Fractals

Last week, I attended a "Flower Fest" where I had the opportunity to admire several of the most beautiful and awarded flowers, orchids, and decoration plants. Surprisingly, though, I never had thought of flowers like fractals the way I did this time. Fractals attract lots of interest, especially from mathematicians who actually spend some time … Read More...

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