mat2 -- Typical circuit matrix.
8 real
1 1 0.0010686
1 2 -1.66e-05
1 5 -0.001
1 6 -4.2e-05
2 1 5.9554e-05
2 2 0.000131298
2 6 -9.16434e-05
2 7 0.000148333
3 3 0.00213033
3 5 -0.002
3 7 0.000190213
3 8 -4.2e-05
4 4 0.000275862
4 6 -4.6936e-05
5 1 -0.001
5 3 -0.002
5 5 0.00308858
5 8 0.000666678
6 1 -0.000118154
6 2 -6.68894e-08
6 4 -4.71518e-05
6 6 0.000366644
7 2 -0.000200677
7 3 -1.8e-06
7 7 0.000333767
8 3 -0.000198585
8 5 -7.2e-06
8 8 0.000431315
0 0 0
4.03934e-07
-3.044e-07
-1.53475e-05
5.28676e-08
1.5958e-05
-9.9608e-08
-2.13155e-07
4.15313e-09