Calculate number of characters in string in R [duplicate]

This question already has an answer here:

• Count the number of all words in a string 14 answers

My sample dataset looks like below. I need to calculate the number of characters.

keyword <- c("advertising",
         "advertising budget",
         "marketing plan detail",
         "marketing budget and forecast")

I tried the "nchar" function, but it actually calculates the number of digits. For this sample, the results should be 1,2,3,4.

Solved

One option is str_count and specify the patterns for word (\\w+)

library(stringr)
str_count(keyword, "\\w+")
#[1] 1 2 3 4

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Or with base R

lengths(gregexpr("\\w+", keyword))
#[1] 1 2 3 4

unlist( lapply(strsplit(keyword, split = "\ "), length) )
[1] 1 2 3 4