subset vector by first letter in R

Question

I am working in R and I have a character vector. I would like to subset this vector by the first letter of the string of characters. So, for example, how can I subset the ve

Answer 1

You could also use substr with tapply to get a list of all types:

tapply(vector,toupper(substr(vector,1,1)),identity)

$A
[1] "apple" "Actor"

$B
[1] "banana"

$F
[1] "fox"

Answer 2

you can use grep:

vector = c("apple", "banana", "fox", "Actor")
vector[grep("^[aA].*", vector)]

[1] "apple" "Actor"