Question

我正在使用R. 假设我有一个城市矢量，我想单独使用这些城市名称在一个字符串中。

city = c("Dallas", "Houston", "El Paso", "Waco")

phrase = c("Hey {city}, what's the meaning of life?")

所以我想最终得到四个单独的短语。

"Hey Dallas, what's the meaning of life?"
"Hey Houston, what's the meaning of life?"
...

Python中是否有类似于format（）的函数允许我能以简单/有效的方式完成这项任务吗？

想避免下面的事情。

for( i in city){
    phrase = c("Hey ", i, "what's the meaning of life?")
}

Answer 1

sprintf怎么样？

> city = c("Dallas", "Houston", "El Paso", "Waco")
> phrase = c("Hey %s, what's the meaning of life?")
> sprintf(phrase, city)
[1] "Hey Dallas, what's the meaning of life?"  "Hey Houston, what's the meaning of life?"
[3] "Hey El Paso, what's the meaning of life?" "Hey Waco, what's the meaning of life?"

Answer 2

根据需要的复杂程度，一个简单的粘贴可以完成这项工作：

paste("Hey ", city, ", what's the meaning of life", sep="")

做你想做的事。

@Zach的答案，sprintf虽然有很多优点，比如正确格式化双打等。

为字符串中的元素指定不同的值

2 个答案: