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EEDSP
Digital Signal Processing, Data Analytics, Big Data, HPC, Deep Learning, GPGPU
Curated by Shiwon Cho
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K-means Clustering (from

K-means Clustering (from | EEDSP | Scoop.it
In R’s partitioning approach, observations are divided into K groups and reshuffled to form the most cohesive clusters possible according to a given criterion. There are two methods—K-means and partitioning around mediods (PAM).
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Gibbs Sampler in C++

Gibbs Sampler in C++ | EEDSP | Scoop.it
Markov Chain Monte Carlo (MCMC) is a popular simulation method. As it is somewhat demanding, it is also frequently used to benchmark different implementations or algorithms.
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Interfacing R and Google maps

Interfacing R and Google maps | EEDSP | Scoop.it
Introduction
I couple of weeks ago I had an idea for a website where people can collaborate to create the first real Audio Atlas, using the power of the Google Maps API. The problem was that I do...
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The Julia Language

The Julia Language | EEDSP | Scoop.it

Julia is a high-level, high-performance dynamic programming language for technical computing, with syntax that is familiar to users of other technical computing environments. 

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How to run R in the cloud (for teaching)

How to run R in the cloud (for teaching) | EEDSP | Scoop.it

The DataMind platform consists of two parts: a front-end application, which our users see on their pc, laptop or tablet and that runs in their browser; and a collection of backend applications that handle all the interaction between users and the platform 

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Vert.x 2.0.0-final is released!

Dear World, I'm pleased to announce the release of Vert.x 2.0.0.final. It's been a rollercoaster/marathon run to get here since we released 1.3.1.final back in January, and it's fair to say we're a...
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Read Excel files from R

Many people still save their data into Microsoft Excel files. This is an unhappy choice for many reasons but many was already written about this topic.
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ngramr – an R package for Google Ngrams

ngramr – an R package for Google Ngrams | EEDSP | Scoop.it

The Google Ngram Viewer is a tool for tracking the frequency of words or phrases across the vast collection of scanned texts in Google Books. As an example, the chart below shows the frequency of the words “Marx” and “Freud”. It appears that Marx peaked in population in the late 1970s and had been in decline ever since. Freud persisted for a decade longer but has likewise been in decline.

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Fork Less in Bash and See Performance Wins | Architects Zone

Fork Less in Bash and See Performance Wins | Architects Zone | EEDSP | Scoop.it

It's 100x faster to skip the fork.

Now, granted this is a pretty dumb example, and it's easy to rewrite this to perform better than the bash example (i.e. don’t use a loop and just use awk which is 3x faster than the pure bash solution). So, think about what your doing, use a pipe over a loop, and if you can’t do that, try to find a built-in that can take care of your needs.

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R talks to Weka about Data Mining

R talks to Weka about Data Mining | EEDSP | Scoop.it
R provides us with excellent resources to mine data, and there are some good overviews out there: Yanchang’s website with Examples and a nice reference card The rattle-package that introduces a nice GUI for R, and Graham William’s compendium of...
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A possibility for use R and Hadoop together

As mentioned in the previous article, a possibility for dealing with some Big Data problems is to integrate R within the Hadoop ecosystem. Therefore, it's neces
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Scienceblogging

Feeds from science blogging networks hosted by media organizations, science publishers and scientific organizations as well as self-organized bloggers' collectives .

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Page 10 - The 10 Coolest Big Data Startups Of 2013 (So Far)

Page 10 - The 10 Coolest Big Data Startups Of 2013 (So Far) | EEDSP | Scoop.it
Perhaps, surprisingly, one of the most buzzed-about big data startups in 2013 is a solution provider.
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Google Developers R Programming Video Lectures

Google Developers recognized that most developers learn R in bits and pieces, which can leave significant knowledge gaps. To help fill these gaps, they created a series of introductory R programmin...
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A Beginner’s Look at Julia

‘Julia‘, which aims to be a high-level language with performance approaching that of C. With that goal in mind, Julia could be a replacement for the ‘multi-language’ problem of needing to move between R, Python, MATLAB, C, Fortran, Scala, etc. within a single scientific programming project.  Here are some observations that might be helpful for others looking to get started with Julia.

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OpenMP.org » OpenMP Specifications

OpenMP.org » OpenMP Specifications | EEDSP | Scoop.it

OpenMP 4.0 supports the programming of accelerators, SIMD programming, and better optimization using thread affinity

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How much memory does malloc(0) allocate?

On most systems, this little C program will soak up all available memory:

while (1) { malloc(0); }

so the answer is not the obvious "zero." But before getting into malloc(0), let's look at the simpler case of malloc(1). 

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Hadoop Guru: Traditional Database Vs Hadoop

Hadoop Guru: Traditional Database Vs Hadoop | EEDSP | Scoop.it
traditional, rdbms, dbms, comapre, differences, vs, hadoop, limitations, scalability, unstructured, big, data,Nosql, economical, commodity, hardware, open, source,
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Sankey from Scratch

Sankey from Scratch | EEDSP | Scoop.it

This example will walk through the steps of using the R package igraph to create a tree network for a sankey diagram. This is a great exercise to learn some basics of igraph, explore the construction of a sankey, and determine the conditions for a network to be drawn properly as a sankey. After all of this, we will plot our network with the rCharts implementation of the d3.js sankey plugin.

 
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High Performing Predictive Analytics with R and Hadoop

High Performing Predictive Analytics with R and Hadoop | EEDSP | Scoop.it

These new in-Hadoop predictive analytics capabilities will be available by the end of the year as part of the next update to Revolution R Enterprise.

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Generate UUIDs in R

Here a snippet of R to generate a Version 4 UUID. Dunno why there wouldn't be an official function for that in the standard libraries, but if there is, I couldn't find it.
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Faster Multivariate Normal densities with RcppArmadillo and OpenMP

Faster Multivariate Normal densities with RcppArmadillo and OpenMP | EEDSP | Scoop.it
The Multivariate Normal density function is used frequently in a number of problems. Especially for MCMC problems, fast evaluation is important. Multivariate Normal Likelihoods, Priors and mixture...
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Working with Dynamic Memory in C++ | 12.1. Dynamic Memory and Smart Pointers | InformIT

Working with Dynamic Memory in C++ | 12.1. Dynamic Memory and Smart Pointers | InformIT | EEDSP | Scoop.it
C++ lets you allocate objects dynamically.
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PLOS ONE : accelerating the publication of peer-reviewed science

PLOS ONE : accelerating the publication of peer-reviewed science | EEDSP | Scoop.it
PLOS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.
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