CODEWITHSUNDEEP
r
Fredrik
Fredrik

Reputation: 449

r convert data frame to list of lists

Given the following data frame:

Date       Person   Article
---------------------------
01-01-2015 Bob      TV
01-01-2015 Bob      Video
01-01-2015 Pete     Book
02-01-2015 Rob      Skate
02-01-2015 Kate     TV

How could I convert this data frame to a list of list (or multidimensional array) so, that

my_ist[[01-01-2015]][[Bob]]

would give

TV, Video

?

Upvotes: 2

Views: 1276

Answers (1)

DatamineR
DatamineR

Reputation: 9618

What about this?

res <- lapply(split(df, df$V1), function(x) sapply(split(x, x$V2), function(y) y$V3))
res[["01-01-2015"]][["Bob"]]
[1] "TV"    "Video"

Upvotes: 2

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