R Convert list to lowercase

Var1 is a list:

var1 <- list(c("Parts of a Day", "Time in Astronomy", "Star"), c("Tree Tall", "Pine Tree")) 

How to convert all the characters to lowercase? The desired answer is the following list:

var1 <- list(c("parts of a day", "time in astronomy", "star"), c("tree tall", "pine tree")) 

I used

as.list(tolower(var1)) 

But it gives the following answer with unwanted \

[[1]] [1] "c(\"parts of a day\", \"time in astronomy\", \"star\")" [[2]] [1] "c(\"tree tall\", \"pine tree\")" 

Thanks.

2 Answers

You should use lapply to lower case each character vector in your list

lapply(var1, tolower) # [[1]] # [1] "parts of a day" "time in astronomy" "star" # # [[2]] # [1] "tree tall" "pine tree" 

otherwise tolower does as.character() on your entire list which is not what you want.

1

Use gsub

gsub("/", "", var1) as.list(tolower(var1)) 

this will remove all your / out of your variable.

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