Ordering Input Choices

Hi people.

I need to order some choices of my selectInput. look:

      label = "Steel:",
      choices= c("", dfMateriais$AQA_QT),
      multiple = T

So, when I look to my choices, it's like:

It's not ordered. What kind of syntax can I use to order this?


It works with:

sort(c("", dfMateriais$AQA_QT))

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