selectInput(inputId, label, choices, selected = NULL, multiple = FALSE,
  selectize = TRUE, width = NULL, size = NULL)selectizeInput(inputId, ..., options = NULL, width = NULL)
input slot that will be used to access the value.NULL for no label.multiple = TRUE). If not specified then defaults to the first value
for single-select lists and no values for multiple select lists.'400px', or '100%';
see validateCssUnit.selectize=TRUE.
Normally, when multiple=FALSE, a select input will be a drop-down
list, but when size is selectInput().I() will
be treated as literal JavaScript code; see selectInput() and selectizeInput() use the
JavaScript library selectInput() with selectize=FALSE.updateSelectInputOther input.elements: actionButton,
  actionLink; animationOptions,
  sliderInput;
  checkboxGroupInput;
  checkboxInput; dateInput;
  dateRangeInput; fileInput;
  numericInput; passwordInput;
  radioButtons; submitButton;
  textInput
selectInput("variable", "Variable:",
            c("Cylinders" = "cyl",
              "Transmission" = "am",
              "Gears" = "gear"))Run the code above in your browser using DataLab