title: R shiny; how to use multiple inputs from selectInput to pass onto 'select' option in dplyr?
body: <p>I have an app wherein I am looking to take user input in the "ui" file and use that information to update a dataframe in the "server" file. The following is a simplified version of what the code looks like:</p>
  
  <pre><code>Dataframe &lt;- readRDS(Dataframe.rds)
  Table &lt;- readRDS(Table.rds)    
  
  ui &lt;- fluidPage(
       selectInput("Location","Location",
                unique(as.character(Table$Locations)), multiple = TRUE)
                  )
  
  server &lt;- function(input,output) {
   Dataframe2 &lt;- Dataframe %&gt;% select(get(input$Location))
                                   }
  </code></pre>
  
  <p>The above code works if I do not use the "multiple = TRUE" option for selectInput, meaning that the Dataframe2 object only selects the column that matches with the single input that the user has chosen. However, I do not know how I can do the same thing for multiple inputs, when the choices could vary from only 1 item being passed on from selectInput up to 10 items in total. </p>