list(J= 8.00000E+00, y=c( 2.80000E+01,  8.00000E+00,  -3.00000E+00,  7.00000E+00,  -1.00000E+00,  1.00000E+00,  1.80000E+01,  1.20000E+01), sigma.y=c( 1.50000E+01,  1.00000E+01,  1.60000E+01,  1.10000E+01,  9.00000E+00,  1.10000E+01,  1.00000E+01,  1.80000E+01))