Monthly Archives: March 2014

Interactive Discovery of Research Affiliates JoPM Paper

March 25, 2014
By

In my previous post More on Rebalancing | With Data from Research Affiliates , I did some really basic visualizations, but I thought this data would be great for some more powerful interactive discovery using an interesting javascript SQL-like query l...

Read more »

Filtering Data with L2 Regularisation

March 25, 2014
By
Filtering Data with L2 Regularisation

I have just finished reading Momentum Strategies with L1 Filter by Tung-Lam Dao. The smoothing results presented in this paper are interesting and I thought it would be cool to implement the L1 and L2 filtering schemes in R. We’ll start with the L2 scheme here because it has an exact solution and I will

Read more »

Wright Map Tutorial – Part 3

March 25, 2014
By
Wright Map Tutorial – Part 3

In this part of the tutorial, we’ll show how to load ConQuest output to make a CQmodel object and then WrightMaps. We’ll also show how to turn deltas into thresholds. All the example files here are available in the /inst/extdata folder of the github. If you download the latest version of the package, they should be in a folder...

Read more »

Wright Map Tutorial – Part 3

March 25, 2014
By
Wright Map Tutorial – Part 3

In this part of the tutorial, we’ll show how to load ConQuest output to make a CQmodel object and then WrightMaps. We’ll also show how to turn deltas into thresholds. All the example files here are available in the /inst/extdata folder of the github. If you download the latest version of the package, they should be in a folder...

Read more »

Sankey diagrams with googleVis

March 25, 2014
By
Sankey diagrams with googleVis

Sankey diagrams are great for visualising flows from one set of data values to another. Although named after Irish Captain Matthew Henry Phineas Riall Sankey, who used this type of diagram in 1898 to show the energy efficiency of a steam engine, the best know Sankey diagram is probably Charles Minard's Map of Napoleon's Russian Campaign...

Read more »

Which states are the most concerned by gun crime?

March 24, 2014
By
Which states are the most concerned by gun crime?

I recently discovered the Capitol Words API and have had some fun playing around with it. One of the categories in the API allows you to search for the words spoken by the senators of each state in the USA, and I was interested in finding out the number of times the words “gun” were recorded on a

Read more »

WrightMap Tutorial – Part 2

March 24, 2014
By
WrightMap Tutorial – Part 2

Plotting Multidimensional & Polytomous Models Remember: you can find the other parts of the tutorial here: Part 1: Plotting Unidimensional Dichotomous Models Part 3: Using Conquest Output & Making Thresholds Multidimensional models In Part 1, we reviewed how to install the package from GitHub and how to customize unidimensional and dichotomous models. Now in Part 2, we’ll look at graphing some...

Read more »

Free eBook on Big Data and Data Science

March 24, 2014
By

The fine folks behind the Big Data Journal have just published a new e-book Big Data: Harnessing the Power of Big Data Through Education and Data-Driven Decision Making. (Note: Adobe Flash is required to view the e-book.) In the eBook, you'll find the following technical papers on the topics of Big Data, Data Science, and R: Data Science and...

Read more »

Hack, a template for improving code reliability

March 24, 2014
By

My sole prediction for 2014 has come true, Facebook have announced the Hack language (if you don’t know that HHVM is the Hip Hop Virtual Machine you are obviously not a trendy developer). This language does not follow the usual trend in that it looks useful, rather than being fashion fluff for corporate developers to

Read more »

Image CGI with R

March 24, 2014
By

I received an email recently with a question about using R in the common gateway interface (CGI) framework to create and pass image data to the web browser. I posted to stackoverflow about this some time ago, but had forgotten the details. The trouble is that R's graphics devices only write image data to file,

Read more »

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)