Initialize automtatically selectInput in R Shiny -

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so have selectinput ask user variables want keep dataframe. problem want specific variable pre-selected or @ least added select list after made choice.

for example ask variables want keep : "color","length","name","price","website"

let's chose "name" , "price" want variable "website" in select, how can add list after choice ?

and if choose "name" , "website" took variable need, how do program doesn't add "website" twice!

thanks in advance, fellow r user discovered today rshiny !

have day

edit : alright i'm dumb, tried option selected, didn't work it's because put @ wrong selectinput

so yeah, using option selected, sorry


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