list(p = c(0.25, 0.25, 0.25, 0.25),
error = structure(.Data = c(NA, NA, NA, NA,
0.5, 0.5, NA, NA,
                           0.33333333, 0.33333333,0.33333333, NA,
                           0.25, 0.25, 0.25, 0.25), .Dim = c(4, 4)))