我使用的是R. 假設我有一個城市矢量，我想在字符串中單獨使用這些城市名稱 。爲字符串中的元素指定不同的值
city = c("Dallas", "Houston", "El Paso", "Waco")
phrase = c("Hey {city}, what's the meaning of life?")
所以我想結束四個單獨的短語。
"Hey Dallas, what's the meaning of life?"
"Hey Houston, what's the meaning of life?"
...
是否有一個功能類似Python的格式（），這將使 我在一個簡單/高效的方式執行這項任務？
想避免像下面這樣的東西。
for(i in city){
phrase = c("Hey ", i, "what's the meaning of life?")
}
sprintf怎麼樣？
> 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?"
取決於它需要多麼複雜是，一個簡單的粘貼可以做的工作：
paste("Hey ", city, ", what's the meaning of life", sep="")
你想要做什麼。
@扎克的回答，sprintf的有很多的優點，雖然一樣，雙打等的正確的格式
+1從來不知道的sprintf（）謝謝！ – ATMathew
沒有printf，但是你可以用'printf < - function（format_string，...）{cat（sprintf（format_string，...））} – Zach