Nothing
capwords <- function(s,
strict=FALSE,
AP=TRUE,
onlyfirst=FALSE,
preserveMixed=FALSE,
sep=" ")
{
# worker functions
cap <- function(s)
paste(toupper(substring(s, 1, 1)),
{
s <- substring(s, 2);
if(strict) tolower(s) else s
},
sep = ""
)
# test if there is a lowercase letter followed by an uppercase letter
isMixedCase <- function(s)
grepl("[a-z][A-Z]", s)
words <- unlist(strsplit(s, split = sep))
mixedCaseFlag <- sapply(words, isMixedCase)
# First, capitalize *every* word
if(!onlyfirst)
{
newWords <- sapply(words,
cap
)
if(preserveMixed==TRUE)
newWords[mixedCaseFlag] <- words[mixedCaseFlag]
words <- newWords
}
# Next (optionally) uncapitalize prepositions and conjunctions
# recommended by the Associated Press.
AP.nocap <- c("a", "an", "and", "at", "but", "by", "for", "in",
"nor", "of", "on", "or", "so", "the", "to", "up",
"yet")
if(AP && !onlyfirst)
for(word in AP.nocap)
words <- gsub(paste0("^",word,"$"),
word,
words,
ignore.case=TRUE)
# Finally, ensure that the first word is capitalized
if(length(words)>0 && mixedCaseFlag[1]==FALSE)
words[1] <- cap(words[1])
retval <- paste(words, collapse=sep)
retval
}
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