combine_words {knitr} | R Documentation |
When a value from an inline R expression is a character vector of multiple
elements, we may want to combine them into a phrase like a and b, or
a, b, and c
. That is what this a helper function does.
combine_words(words, sep = ", ", and = " and ", before = "", after = before)
words |
a character vector |
sep |
the separator to be inserted among words |
and |
a character string to be prepended to the last word |
before, after |
A character string to be added before/after each word |
If the length of the input words
is smaller than or equal to 1,
words
is returned. When words
is of length 2, the first word
and second word are combined using the and
string. When the length is
greater than 2, sep
is used to separate all words, and the and
string is prepended to the last word.
A character string.
combine_words("a") combine_words(c("a", "b")) combine_words(c("a", "b", "c")) combine_words(c("a", "b", "c"), sep = " / ", and = "") combine_words(c("a", "b", "c"), and = "") combine_words(c("a", "b", "c"), before = "\"", after = "\"")