R: Create interactive control to select one (or more options)...

input_select {ggvis} | R Documentation

## Create interactive control to select one (or more options) from a list.

### Description

- `input_radiobuttons` only ever selects one value

- `input_checkboxgroup` can alway select multiple values

- `input_select` can select only one if `multiple = FALSE`, otherwise the user can select multiple by using modifier keys

### Usage

    input_select(choices, selected = NULL, multiple = FALSE, label = "",
      id = rand_id("select_"), map = identity, selectize = FALSE)

    input_radiobuttons(choices, selected = NULL, label = "",
      id = rand_id("radio_"), map = identity)

    input_checkboxgroup(choices, selected = NULL, label = "",
      id = rand_id("radio_"), map = identity)

### Arguments

`choices` | List of values to select from. If elements of the list are named then that name rather than the value is displayed to the user.
`selected` | The initially selected value (or multiple values if `multiple = TRUE`). If not specified then defaults to the first value for single-select lists and no values for multiple select lists.
`multiple` | Is selection of multiple items allowed?
`label` | Display label for the control, or `NULL` for no label.
`id` | A unique identifier for this input. Usually generated automatically.
`map` | A function with single argument `x`, the value of the control on the client. Returns a modified value.
`selectize` | Whether to use selectize.js or not.

### See Also

Other interactive input: `input_checkbox`, `input_slider`, `input_text`

### Examples

    # Dropdown
    input_select(c("a", "b", "c"))
    input_select(c("a", "b", "c"), multiple = TRUE)
    input_select(c("a", "b", "c"), selected = "c")

    # If you want to select variable names, you need to convert
    # the output of the input to a name with map so that they get
    # computed correctly
    input_select(names(mtcars), map = as.name)

    # Radio buttons
    input_radiobuttons(choices = c("Linear" = "lm", "LOESS" = "loess"),
                       label = "Model type")
    input_radiobuttons(choices = c("Linear" = "lm", "LOESS" = "loess"),
                       selected = "loess",
                       label = "Model type")

    # Used in layer_model_predictions
    mtcars %>% ggvis(~wt, ~mpg) %>%
      layer_model_predictions(model = input_radiobuttons(
        choices = c("Linear" = "lm", "LOESS" = "loess"),
        selected = "loess",
        label = "Model type"))

    # Checkbox group
    mtcars %>% ggvis(x = ~wt, y = ~mpg) %>%
      layer_points(
        fill := input_checkboxgroup(
          choices = c("Red" = "r", "Green" = "g", "Blue" = "b"),
          label = "Point color components",
          map = function(val) {
            rgb(0.8 * "r" %in% val, 0.8 * "g" %in% val, 0.8 * "b" %in% val)
          }
        )
      )

[Package ggvis version 0.4.3 Index]