检查对象是否是 R 编程中的字符类型 - 是。字符()函数

R 语言中的is.character()函数用于检查作为参数传递给它的对象是否为字符类型。

Syntax: is.character(x)

Parameters:
x: Object to be checked

示例 1：

# R program to check if 
# object is a character
  
# Creating a vector
x1 <- 4
x2 <- c("a", "b", "c", "d")
x3 <- c(1, 2, "a", 3, "b")
  
# Calling is.character() function
is.character(x1)
is.character(x2)
is.character(x3)

输出：

[1] FALSE
[1] TRUE
[1] TRUE

示例 2：

# R program to check if 
# object is a character
  
# Creating a matrix
x1 <- matrix(letters[1:9], 3, 3)
  
# Calling is.character() function
is.character(x1)

输出：

[1] TRUE