RDocumentation: str_conv

if(!require('stringr')) {
    install.packages('stringr')
    library('stringr')
}

# Example from encoding?stringi::stringi
x <- rawToChar(as.raw(177))
x
str_conv(x, "ISO-8859-2") # Polish "a with ogonek"
str_conv(x, "ISO-8859-1") # Plus-minus