Lists 

AList <- list(1:5,
              letters[1:6],
              c(TRUE,FALSE,FALSE,TRUE))
AList

[[1]]
[1] 1 2 3 4 5

[[2]]
[1] "a" "b" "c" "d" "e" "f"

[[3]]
[1]  TRUE FALSE FALSE  TRUE

AList[1:2]

[[1]]
[1] 1 2 3 4 5

[[2]]
[1] "a" "b" "c" "d" "e" "f"

AList[1]

[[1]]
[1] 1 2 3 4 5

AList[[2]]

[1] "a" "b" "c" "d" "e" "f"

AList[[1:2]]

[1] 2

AList[[1:3]]

Error in AList[[1:3]]:
recursive indexing failed at level 2

Traceback:

length(AList)

[1] 3

FDR <- list(c("John","Delano"),
            c("Roosevelt"))

names(FDR) <- c("first.name","last.name")
FDR

$first.name
[1] "John"   "Delano"

$last.name
[1] "Roosevelt"

FDR <- list(first.name=c("John","Delano"),
            last.name=c("Roosevelt"))
FDR

$first.name
[1] "John"   "Delano"

$last.name
[1] "Roosevelt"

FDR$last.name

[1] "Roosevelt"

FDR[["last.name"]]

[1] "Roosevelt"

UK <- list(
    country.name = c("England","Northern Ireland","Scotland",
                                                  "Wales"),
    population   = c(54786300,1851600,5373000,3099100),
    area.sq.km   = c(130279,13562,77933,20735),
    GVA.cap      = c(26159,18584,23685,18002))
UK

$country.name
[1] "England"          "Northern Ireland" "Scotland"         "Wales"           

$population
[1] 54786300  1851600  5373000  3099100

$area.sq.km
[1] 130279  13562  77933  20735

$GVA.cap
[1] 26159 18584 23685 18002

data.frame(UK)

      country.name population area.sq.km GVA.cap
1          England   54786300     130279   26159
2 Northern Ireland    1851600      13562   18584
3         Scotland    5373000      77933   23685
4            Wales    3099100      20735   18002
  • R file: lists.R
  • Rmarkdown file: lists.Rmd
  • Jupyter notebook file: lists.ipynb
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