These data are used in the book "Computational Statistics" 
by G.H. Givens and J.A. Hoeting.

Name: ximage.dat
Chapter: 8
Discussed in: Problem 8.5

Description: Synthetic data for a 20x20 pixel grey-scale image, as
described in Problem 8.5 and Figure 8.12.  The value for the (i,j)th
pixel is given in the (i,j)th entry in ximage.dat.

Variable labels: