进行替换

Created: November-22, 2018

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

让棕色的狐狸变成红色：

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

现在，让我们来做 fast fox act fastly。这不会这样做：

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

sub 只是第一个可用的替代品，我们需要 gsub 进行全局更换：

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

有关更多示例，请参阅通过替换修改字符串。