% "Hand" data set for use with plot2d.
% Try plot2d(A*X) for various 2 by 2 matrices A.

X = [ ...
  4.4  6.0  6.8  7.0  6.6  6.0  5.3  4.7  4.2  3.8  3.7  3.6  3.4  3.1 ...
  2.6  2.1  1.6  1.3  1.0  0.9  0.8  0.6  0.2 -0.3 -0.8 -0.9 -1.0 -1.3 ...
 -1.8 -2.6 -3.4 -4.2 -4.7 -4.6 -4.0 -3.2 -3.0 -3.9 -5.4 -6.8 -7.7 -8.0 ...
 -7.7 -6.9 -5.7 -4.5 -3.6 -3.1 -3.5

 -9.7 -5.6 -2.4 -0.1  1.2  1.4  0.4 -1.7 -3.6 -4.0 -2.0  1.5  5.0  7.2 ...
  7.8  6.6  3.9  1.1 -0.1  1.5  4.6  7.7  9.4  9.3  7.4  4.1  0.7 -0.9 ...
  0.2  3.1  5.9  7.3  7.0  5.3  2.3 -0.6 -2.3 -1.8 -0.2  1.5  1.9  1.4 ...
  0.2 -1.4 -3.2 -5.0 -6.7 -8.3 -9.5]