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  clustmidpts
  
2012 May 23
3
applying cbind (or any function) across all components in a list
#If I have two lists as follows
a1<-  array(1:6, dim=c(2,3))
a2<-  array(7:12, dim=c(2,3))
l1<-  list(a1,a2)
a3<-  array(1:4, dim=c(2,2))
a4<-  array(5:8, dim=c(2,2))
l2<-  list(a3,a4)
#how can I create a new list with the mean across all arrays within the
list, so all components are included?  As an example for [[1]];
cbind((l1[[1]][,1]+l2[[1]][,1])/2,