r - Shiny - How not to select any option in radioButtons? -


how can not select option in radiobuttons?

from doc:

selected selected value (if not specified defaults first value)

but don't want select when page loaded. possible?

from documentation:

if need represent "none selected" state, it's possible default radio buttons have no options selected using selected = character(0). however, not recommended, gives user no way return state once they've made selection. instead, consider having first of choices c("none selected" = "").

hope helps.


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