  Irrelevant 
##  2 red        1 a       0.184 2     Irrelevant 
##  3 red        1 a      -0.836 3     Irrelevant 
##  4 red        2 a       1.60  4     Irrelevant 
##  5 red        2 a       0.330 5     Irrelevant 
##  6 red        6 b      -0.820 6     Irrelevant 
##  7 red        6 b       0.487 7     Irrelevant 
##  8 red        6 b       0.738 8     Irrelevant 
##  9 red      999 c       0.576 9     Irrelevant 
## 10 red       NA c      -0.305 10    Irrelevant 
## 11 blue       4 c       1.51  11    