368 search results for "PCA"

London Vs Boston

October 2, 2015
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London Vs Boston

By Paulin Shek Following the great success of the EARL conference in London earlier this month, our attention now turns to EARL Boston which will take place between 2-4th November just across the pond; the competition is already on to … Continue reading →

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Rebuilding Map Example With Apply Functions

September 30, 2015
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Yesterday Hadley’s functional programming package purrr was published to CRAN. It is designed to bring convenient functional programming paradigma and add another data manipulation framework for R. “Where dplyr focusses on data frames, purrr focusses on vectors” – Hadley Wickham in a blogpost The core of the package consists of map functions, which operate similar to...

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Six lines to install and start SparkR on Mac OS X Yosemite

September 20, 2015
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Six lines to install and start SparkR on Mac OS X Yosemite

I know there are many R users who like to test out SparkR without all the configuration hassle. Just these six lines and you can start SparkR from both RStudio and command line. One line for Spark and SparkR Apache Spark is a fast and general-purpose cluster computing system SparkR is an R package that...

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Predicting Titanic deaths on Kaggle VI: Stan

September 19, 2015
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It is a bit a contradiction. Kaggle provides competitions on data science, while Stan is clearly part of the (Bayesian) statistics. Yet after using random forests, boosting and bagging, I also think this problem has a suitable size for Stan, which I un...

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New R Software/Methodology for Handling Missing Dat

September 16, 2015
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New R Software/Methodology for Handling Missing Dat

I’ve added some missing-data software to my regtools package on GitHub. In this post, I’ll give an overview of missing-data methodology, and explain what the software does. For details, see my JSM paper, jointly authored with my student Xiao (Max) Gu. There is a long history of development of techniques for handling missing data. See the … Continue reading...

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In case you missed it: August 2015 roundup

September 14, 2015
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In case you missed them, here are some articles from August of particular interest to R users. Creating interactive time series charts of financial data in R. Many R books have been translated into Chinese. A tutorial on visualizing current-events geographic data with choropleths. Revolution R Enterprise 7.4.1 is now available on Windows and Linux servers and in the...

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xkcd survey and the power to shape the internet

September 2, 2015
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xkcd survey and the power to shape the internet

The xkcd survey If you’ve never heard of xkcd, it’s “ webcomic of romance, sarcasm, math, and language” created by Randall Munroe. Also, if you’ve never heard of xkcd, be prepared for losing at least a day’s worth of productivity reading the comics and the excellent what if column where Randall answers hypothetical questions with physics. Randall...

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Modern Honey Network Machinations with R, Python, phantomjs, HTML & JavaScript

August 23, 2015
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Modern Honey Network Machinations with R, Python, phantomjs, HTML & JavaScript

This was (initially) going to be a blog post announcing the new mhn R package (more on what that is in a bit) but somewhere along the way we ended up taking a left turn at Albuquerque (as we often do here at ddsec hq) and had an adventure in a twisty maze of Modern Honey Network...

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Why I Don’t Like Jupyter (FKA IPython Notebook)

August 22, 2015
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Don’t get me wrong, it’s certainly a great tool for presenting your code or even reporting, but everytime I use it for explorative, interactive data science, I keep switching to other tools quite quickly and wonder why I am still even trying to use it. I just mostly end up with messy, broken, “ungitable” and unreadable analyses and I...

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Ofuro, start H2O on Hadoop from R

August 21, 2015
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Ofuro, start H2O on Hadoop from R

tl;dr I made a simple functionality to start H2O on hadoop from R. You can easily start H2O on hadoop, run your analytics and close all the processes without occuppying Hadoop nodes and memory all the time. I like to take a bath. Fill a bath and warm up in there is a perfect refreshment after a hard working day. I...

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