Create an alphabet vector (data source)

Source: R/makeXlColAlphabet.r

Create an alphabet data source according to the given nchar.

make_abcbase(nchar = NULL)

Arguments

nchar

an integer, Default: NULL

Value

a character vector which length is sum(26^(1:nchar)).

Examples

paste0(
  head(make_abcbase(nchar = 3)), tail(make_abcbase(nchar = 3)),
  sep = ", ..., "
)
#> [1] "AZZU, ..., " "BZZV, ..., " "CZZW, ..., " "DZZX, ..., " "EZZY, ..., "
#> [6] "FZZZ, ..., "
sum(26^(1:5)) # length is 12356630
#> [1] 12356630
if (FALSE) {
 make_abcbase(nchar = 0) # Error
 make_abcbase(nchar = 5) # Error
}