Assume a data.frame like this:
tabela <- structure(list(vendedor = structure(1:4, .Label = c("A", "B",
"C", "D"), class = "factor"), Total = c(3300, 440, 1020, 200)), .Names = c("vendedor",
"Total"), row.names = c(NA, -4L), class =...
asked by
23.04.2014 / 02:08