April 2013

Stock Market Predictions with Artificial Neural Networks

April 20, 2013 | 0 Comments

Many of my research and personal interests lie in the realm of Machine Learning for several reasons. To me, it is the perfect blend of mathematics, statistics, and computer science. Also, it is extremely pervasive in today’s society. Everything from improved web-search to self-driving cars can be attributed to ... [Read more...]

Prioritizing project stakeholders using social network metrics

April 20, 2013 | 0 Comments

Identifying project stakeholders and their requirements is a very important factor in the success of any project. Existing techniques tend to be very ad-hoc. In her PhD thesis Soo Ling Lim came up with a very interesting solution using social network analysis and what is more made her raw data ... [Read more...]

My new forecasting book is finally finished

April 20, 2013 | 0 Comments

My new online forecasting book (written with George Athanasopoulos) is now completed. I previously described it on this blog nearly a year ago. In reality, an online book is never complete, and we plan to continually update it. But it is now at the point where it is suitable for ... [Read more...]

Modeling habitat diversity and species richness

April 20, 2013 | 0 Comments

How does habitat diversity affect species richness? Perhaps intuition suggests that habitat diversity increases species richness by facilitating niche or resource partitioning among species. But, for a fixed area, as habitat heterogeneity increases, the area that can be allocated to each habitat type decreases. In a recent paper, Allouche and ... [Read more...]

RcppArmadillo 0.3.810.0

April 20, 2013 | 0 Comments

A new Armadillo release 3.810.0 by Conrad appeared yesterday, and was wrapped up in a new release 0.3.810.0 of RcppArmadillo. Upstream changes bring FFT support as well as more Sparse matrix constructors, and we have an improvement to the sample() fu... [Read more...]

Basic Mathematical Functions

April 20, 2013 | 0 Comments

R can perform the usual mathematical operations, below are the functions:Arithmetic +    - addition-    - subtraction*    - multiplication/    - divisionTrigonometrysin    ... [Read more...]

Agent-based modeling in R – habitat diversity and species richness

April 20, 2013 | 0 Comments

How does habitat diversity affect species richness? Perhaps intuition suggests that habitat diversity increases species richness by facilitating niche or resource partitioning among species. But, for a fixed area, as habitat heterogeneity increases, the area that can be allocated to each habitat type decreases. In a recent paper, Allouche and ... [Read more...]

Open Source software’s opportunity to reform government

April 19, 2013 | 0 Comments

The results from the 2013 Future of Open Source Survey are in — thanks to everyone who contributed by completing the survey. You can read an overview of the results here, or see the detailed breakdowns in the slides at the end of this post. For me, one of the most interesting ... [Read more...]

Popup notification from R on Windows

April 19, 2013 | 0 Comments

After R is done running a long process, you may need to notify the operator to check the R console and provide the next commands. Without installing any more software or creating any batch files or VBS scripts, here is a simple way to create the popup notice in Windows ... [Read more...]

A Course in Data and Computing Fundamentals

April 19, 2013 | 0 Comments

Daniel Kaplan and Libby Shoop have developed a one-credit class called Data Computation Fundamentals, which was offered this semester at Macalester College. This course is part of a larger research and teaching effort funded by Howard Hughes Medical Institute (HHMI) to help students … Continue reading → [Read more...]

Do the same thing to a bunch of variables with lapply()

April 19, 2013 | 0 Comments

It is extremely common to have a dataframe containing a bunch of variables, and to do the exact same thing to all of these variables. For instance, lets say we have a dataframe that has a bunch of limb bone measurements of different animals, and we wan... [Read more...]

Using the SVD to find the needle in the haystack

April 19, 2013 | 0 Comments

[caption id="attachment_649" align="aligncenter" width="500"] Sitting with a data set with too many variables? The SVD can be a valuable tool when you're trying to sift through a large group of continuos variables. The image is CC by Jonas in China.[/caption] It can feel like a daunting task ... [Read more...]

Third Milano R net meeting: leave a comment

April 19, 2013 | 0 Comments

Third Milano R net meeting took place on April, 18. More than thirty R users and a lot of enthusiasm! You can download presentations and view pictures of the meeting. If you attended the meeting, please leave a comment. Stay … Continue reading → [Read more...]

Presentations of the third Milano R net meeting

April 19, 2013 | 0 Comments

Welcome presentation Nicola Sturaro, Consultant at Quantide (download PDF, 0.5 MB) Machine learning A case of digit recognition based on a shallow neural network implemented in R. Michele Vitali, Statistical consultant (download PDF, 0.2 MB) Chess betting odds How to develop … Continue reading → [Read more...]

R: Streets of France

April 19, 2013 | 0 Comments

I was Inspired from Ben Frys all Streets project. There he plotted all streets of the United States of America (about 240 million segments). I tried this first for the countries in Europe, France has about 22 million segments, with the goal to get an all street map of Europe. My data ... [Read more...]

In Praise of Quandl!

April 18, 2013 | 0 Comments

Data - the econometrician's life-blood! Can't function without it.So, when a new source of data becomes available - especially one that's sophisticated, reliable, and FREE - it's time to sit up and take notice. Quandl is a recent Canadian start-up that delivers economic and financial time-series data, and then ... [Read more...]

Amazon AWS Summit 2013

April 18, 2013 | 0 Comments

I was fortunate enough to have been able to attend the Amazon AWS Summit in NYC and to listen to Werner Vogels give the keynote.  I will share a few of my thoughts on the AWS 2013 Summit and some of my take-aways.  I attended sessions that focused on two products ... [Read more...]

GSoC 2013: At the starting line

April 18, 2013 | 0 Comments

Google Summer of Code will be open for students on Monday, April 22.  The R Project has once again been selected as a mentoring organization , and a variety of mentors have proposed a number of projects for students to work on during this summer.  Here’s a bit about the program, ... [Read more...]
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