### String 字元/Case 調整大小寫
  • R 語言調整大小寫
    • toupper() 函數
    • tolower() 函數
shaq <- "Shaquille O'Neal"
toupper(shaq)
## [1] "SHAQUILLE O'NEAL"

tolower(shaq)
## [1] "shaquille o'neal"

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