Below are few scenarios for changing cases(upper to lower and vice ) of column_name or column_value in R .
Scenario -1 (Changing column names from upper case to Lower case)
Library used - > Data.table
Syntax ->setnames(),tolower()
-- Example
df=setnames(df, tolower(names(df[1:3])))
Note: in the above example [1:3] means the range of the columns , i.e. 1st column to 3rd column
Scenario -2 (Changing column names from Lower case to Upper case)
Library -> Data.table
Syntax -> setnames(),toupper()
-- Example
df=setnames(df, toupper(names(df[1:3])))
Note: in the above example [1:3] means the range of the columns. i.e. 1st column to 3rd column
Scenario -3 (Changing column values from upper case to Lowe case)
Library -> Not Applicable
Syntax -> tolower()
-- Example
df$product_id=tolower(df$product_id)
Scenario -4 (Changing Column values from Lower case to Upper case)
Library -> Not Applicable
Syntax -> toupper()
-- Example
df$product_id=toupper(df$product_id)
R-STUDIO