Bertin¹s permutation matrices give simple and effective tools for the graphical analysis of data matrices or tables. We discuss some abstractions which help understanding Bertin¹s strategies and can be used in an interactive system in a paper to be presented at SoftStat '97. The paper is here in full and compressed form as a PostScript file.
Bertin matrices are implemented in the Voyager system.
This is probably defunct - JUICE plug-ins seem not available for recent browsers.
We are exploring technologies for demonstrating this approach, and JUICE is our favourite technology. JUICE allows to run Oberon modules over the net. To read JUICE files, you need a recent Oberon S3 system, or a JUICE plug-in for your favourite WWW reader. As of today (May 1997), the recent S3 system is S3R2, and JUICE has version 1.1. A link to recent JUICE readers is provided on our Oberon page.
If you have a JUICE plug in installed, you should see a Bertin matrix
of random data below.
If you can resize your window, try to get it wide enough to get two
display frames side by side.
You can shift rows and columns around by dragging
the labels. To the right, you get a Bertin matrix of a simple nearest
neighbor smoother of these data, where neighborhood is defined by the
position in the Bertin Matrix of the data.
The lower plot gives the residuals.
You can load other data sets by typing in an URL in the red area. For example, if you request Hotel, you should get Bertin's Hotel data. You cannot load other models in this version so far.
Since we are exploring this technology for future distribution or demonstration of Voyager, we would appreciate error reports and feedback to firstname.lastname@example.org