進行替換

Created: November-22, 2018

# example data
test_sentences <- c("The quick brown fox quickly", "jumps over the lazy dog")

讓棕色的狐狸變成紅色：

sub("brown","red", test_sentences)
#[1] "The quick red fox quickly"       "jumps over the lazy dog"

現在，讓我們來做 fast fox act fastly。這不會這樣做：

sub("quick", "fast", test_sentences)
#[1] "The fast red fox quickly"       "jumps over the lazy dog"

sub 只是第一個可用的替代品，我們需要 gsub 進行全域性更換：

gsub("quick", "fast", test_sentences)
#[1] "The fast red fox fastly"       "jumps over the lazy dog"

有關更多示例，請參閱通過替換修改字串。