[R] List subsetting

[Dieter Menne]

Ivo Shterev wrote:
> 
> 
> I have a question about list indexing. Lets say we have a list of 3 lists,
> each containing 3 different type elements:
> 
> 

(Details of your nice example code removed)


a=replicate(3, list(list(c(1,1,1), diag(3), c(2,2,2)))) 
str(a) # I prefer this to print(a) because it shows the structure better

# in steps
b = lapply(a,function(x){
    # print(str(a)) # put this here to know what you are doing
    x[2:3]
  }
)
#... mmm, not yet what  you wanted. Another try
b[1:2]

# I leave it as a easy exercise to jam this into a one-liner

---
Dieter

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