March 2014

analyze the european social survey (ess) with r

March 31, 2014 | 0 Comments

with more than a decade of microdata aimed at gauging the political mood across european nations, the european social survey (ess) allows scientists like you to examine socio-demographic shifts among broad groups all the way down to pirate party (pirat... [Read more...]

Correlation with constraints on pairs

March 31, 2014 | 0 Comments

An interesting question was posted on http://math.stackexchange.com/726205/…: if one knows the covariances  and , is it possible to infer ? I asked myself a question close to this one a few weeks ago (that I might also relate to a question I asked a long time ago, about possible ... [Read more...]

Capturing Intraday data, Backup plan

March 31, 2014 | 0 Comments

In the Capturing Intraday data post, I outlined steps to setup your own process to capture Intraday data. But what do you do if you missed some data points due for example internet being down or due to power outage your server was re-started. To fill up the gaps in ... [Read more...]

Predictive analysis in ecommerce

March 31, 2014 | 0 Comments

Welcome to the blog post! We all know the predictive analysis is very hot topic now days. Everyone is looking for how the power of predictive analysis can be used in their business and get their business questions solved.  Recently, I was doing study on the predictive analysis in ecommerce. ... [Read more...]

April Fools’ Day: The 7 Funniest Data Cartoons

March 31, 2014 | 0 Comments

To give this years April Fools’ day a more analytical touch, we decided last week do a little poll on internet cartoons. We asked our friends and colleagues to select their favourite data related cartoon on the web, and organized a voting session to construct a top 5 list. (You can ... [Read more...]

Process and observation uncertainty explained with R

March 31, 2014 | 0 Comments

Once up on a time I had grand ambitions of writing blog posts outlining all of the examples in the Ecological Detective.1 A few years ago I participated in a graduate seminar series where we went through many of the examples in this book. I am not a population biologist ... [Read more...]

Exploratory data analysis on P/E ratio of Indian Stocks

March 31, 2014 | 0 Comments

Price Earnings ratio (P/E) is one of the very popular ratios reported with all stocks.  Very simply this is thought as - Current Market Price / Earning per Share.   An operational definition of Earning per Share would be Total profit divided by # of Shares .  I will redirect interested readers for ... [Read more...]

Moustache target distribution and Wes Anderson

March 31, 2014 | 0 Comments

Today I am going to introduce the moustache target distribution (moustarget distribution for brievety). Load some packages first. Let’s invoke the moustarget distribution. This defines a target distribution represented by a SVG file using RShapeTarget. The target probability density function is defined on and is proportional to on the ... [Read more...]

R: Free, Popular, Powerful, Flexible and Supported

March 31, 2014 | 0 Comments

Francis Smart offers five excellent reasons to use R, in a well-researched post ideal for sharing with anyone thinking about making the switch to R. (You might also share this YouTube video for a quick 90-second introduction to R.) The post also includes a novel analysis of interest in R, ... [Read more...]

Probabilistic Momentum with Intraday data

March 30, 2014 | 0 Comments

I want to follow up the Intraday data post with testing the Probabilistic Momentum strategy on Intraday data. I will use Intraday data for SPY and GLD from the Bonnot Gang to test the strategy. Next, let’s examine the hourly perfromance of the strategy. There are lots of abnormal ... [Read more...]

Bayesian Data Analysis [BDA3 – part #2]

March 30, 2014 | 0 Comments

Here is the second part of my review of Gelman et al.’ Bayesian Data Analysis (third edition): “When an iterative simulation algorithm is “tuned” (…) the iterations will not in general converge to the target distribution.” (p.297) Part III covers advanced computation, obviously including MCMC but also model approximations like variational ...
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The freqparcoord Package for Multivariate Visualization

March 30, 2014 | 0 Comments

Recently my student Yingkang Xie and I have developed freqparcoord, a novel approach to the parallel coordinates method for multivariate data visualization.  Our approach: Addresses the screen-clutter problem in parallel coordinates, by only plotting the “most typical” cases, meaning those with the highest estimated multivariate density values. This makes it ... [Read more...]

New Blog on R, Statistics, Data Science and So On

March 30, 2014 | 0 Comments

Hi, Norm Matloff here. I’m a professor of computer science at UC Davis, and was a founding member of the UCD Dept. of Statistics. You may know my book, The Art of R Programming (NSP, 2011).  I have some strong views on statistics–which you are free to call analytics, ... [Read more...]

Looking at Measles Data in Project Tycho

March 30, 2014 | 0 Comments

Project Tycho includes data from all weekly notifiable disease reports for the United States dating back to 1888. These data are freely available to anybody interested. I wanted to play around with the data a bit, so I registered.MeaslesMeasles a... [Read more...]

President Approval Ratings from Roosevelt to Obama

March 29, 2014 | 0 Comments

I have been watching the awesome Netflix show “House of Cards” and been fascinated by the devious schemes that Underwood is constantly plotting. The show often mentions approval ratings and it got me to wondering what Obama’s ratings currently were, and all other past US president  for that matter. ... [Read more...]

R / Finance 2014 Open for Registration

March 29, 2014 | 0 Comments

The annoucement below just went to the R-SIG-Finance list. More information is as usual at the R / Finance page: Now open for registrations: R / Finance 2014: Applied Finance with R May 16 and 17, 2014 Chicago, IL, USA The reg... [Read more...]

Introduction to PortfolioAnalytics

March 29, 2014 | 0 Comments

PortfolioAnalytics Basics This is a guest post by Ross Bennett. Ross is currently enrolled in the University of Washington Master of Science in Computational Finance & Risk Management program with an expected graduation date of December 2014. He worked on the PortfolioAnalytics package as part of the Google Summer of Code 2013 project ... [Read more...]

R/Finance 2014 Registration Open

March 29, 2014 | 0 Comments

As announced on the R-SIG-Finance mailing list, registration for R/Finance 2014 is now open! The conference will take place May 17 and 18 in Chicago.Building on the success of the previous conferences in 2009-2013, we expect more than 250 attendees fro... [Read more...]
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