Description of Cornea Data, and software:

The Cornea Data set, studied in:

Locantore, N., Marron, J. S., Simpson, D. G., Tripoli, N., Zhang, J. T. and Cohen, K. L., “Robust Principal Component Analysis for Functional Data”, (1999) Test, 8, 1-73,

can be found in the .zip file posted at:

http://vm1.cas.unc.edu/stat-or/webspace/miscellaneous/marron/Cornean/Cornean.zip

    In addition to that data, and several others, there is apackage of Matlab software called "Cornean".  This allows several types of analysis, including viewing, and doing various flavors of PCA, among other things).  

    There is a file "read.me", which explains how to use the viewer.  There are also several example data sets, whose Zernike basis representations are in the directory "zfm".  For the data set that was used in Locantore's Spherical PCA paper in Test, see the directory "TestPaperData".