替换文本中的字符

Question

如何用％2B替换+：

这是我的代码

x<-"asflj + ldjjsf ljsdlafj"
gsub("+","%2B",  x)

我的输出是：

"%2Ba%2Bs%2Bf%2Bl%2Bj%2B %2B+%2B %2Bl%2Bd%2Bj%2Bj%2Bs%2Bf%2B %2Bl%2Bj%2Bs%2Bd%2Bl%2Ba%2Bf%2Bj%2B"

我希望它是"asflj %20 ldjjsf ljsdlafj"

Answer 1

+ is a metacharacter然后你可以设置fixed=TRUE跳过它并得到你需要的东西。

> gsub("+","%2B",  x, fixed=TRUE)
[1] "asflj %2B ldjjsf ljsdlafj"

或者使用\\+跳过它

> gsub("\\+","%2B",  x)
[1] "asflj %2B ldjjsf ljsdlafj"