loon.ggplot (version 1.3.4)

hover: Modify the hover component

Description

Provides a pop up display as the mouse hovers over a plot element in the interactive plot.

Usage

hover(itemLabel = NULL, showItemLabels = NULL)

Value

a ggproto object

Arguments

itemLabel

A character vector of length n with a string to be used to pop up when the mouse hovers above that element.

showItemLabels

A single logical value: TRUE if pop up labels are to appear on hover, FALSE (the default) if they are not.

See Also

active, linking, zoom, selection, interactivity

Examples

if(interactive()) {

  l_ggplot(mpg, mapping = aes(x = displ, y = cty)) +
    geom_point(size = 4) +
    # push the states of scatter plot to the histogram
    hover(itemLabel =
       with(mpg,
            paste0("model: ", manufacturer, " ", model, "\n",
                   "year: ", year, "\n",
                   "drive way: ", drv, "\n",
                   "fuel type: ", fl)
       ),
       showItemLabels = TRUE
    )
    # hover the mouse on top of any point to query
}