R语言大小写转换函数（tolower, toupper, casefold,chartr)实战

Posted 2021-09-16 Data+Science+Insight

R语言大小写转换函数（tolower, toupper, casefold,chartr)实战

目录

R语言大小写转换函数（tolower, toupper, casefold,chartr)实战

#仿真数据

# tolower函数和toupper函数

# casefold函数

# chartr函数

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#仿真数据

x <- "Example"                            

# Create example character string

# tolower函数和toupper函数

tolower(x)                                
# Convert to lower case letters
# "example"

toupper(x)                                
# Convert to upper case letters
# "EXAMPLE"

# casefold函数

casefold(x, upper = FALSE)                
# Convert to lower case letters
# "example"

casefold(x, upper = TRUE)                 
# Convert to upper case letters
# "EXAMPLE"

# chartr函数

chartr(old = "Exam", new = "eXaM", x)     
# Translate to upper and lower case
# "eXaMple"

参考：tolower, toupper, casefold & chartr R Functions (3 Examples)

参考：statisticsglobe.com

参考：R