R语言 替换向量的元素 – replace() 函数

R语言中的 replace() 函数用来替换指定的字符串向量x中的值，这些值在列表中给出了索引。

语法： replace(x, list, values)

参数：

x： 矢量

list： 指数

values： 替换值

例1 :

# R program to illustrate
# replace function
  
# Initializing a string vector
x <- c("GFG", "gfg", "Geeks")
  
# Getting the strings
x
  
# Calling replace() function to replace
# the word gfg at index 2 with the 
# GeeksforGeeks element
y <- replace(x, 2, "GeeksforGeeks")
  
# Getting the new replaced strings
y

输出:

[1] "GFG"   "gfg"   "Geeks"
[1] "GFG"   "GeeksforGeeks" "Geeks"  

例2 :

# R program to illustrate
# replace function
  
# Initializing a string vector
x <- c("GFG", "gfg", "Geeks")
  
# Getting the strings
x
  
# Calling replace() function to replace
# the word GFG at index 1 and Geeks at
# index 3 with the A and B elements
# respectively
y <- replace(x, c(1, 3), c("A", "B"))
  
# Getting the new replaced strings
y

输出

[1] "GFG"   "gfg"   "Geeks"
[1] "A"   "gfg" "B"