I am trying to populate an array of lists in R . Here is my code TunePar<-matrix(list(Null),2,2) TunePar[1,1]=list(G=2) But when I type TunePar[1,1,], all I get is 2. The G has disappeared. why? If I do this Test=list(G=2) > Test $G [1] 2 [[alternative HTML version deleted]]