left_right {ggvis}

Interactive inputs bound to arrow keys.

Description

Interactive inputs bound to arrow keys.

Usage

left_right(min, max, value = (min + max)/2, step = (max - min)/40)

up_down(min, max, value = (min + max)/2, step = (max - min)/40)

Arguments

min

A minimum value.

max

A maximum value.

value

The initial value before any keys are pressed. Defaults to half-way between min and max.

step

How much each key press changes value. Defaults to 40 steps along range

Examples

size <- left_right(1, 801, value = 51, step = 50)
opacity <- up_down(0, 1, value = 0.9, step = 0.05)

mtcars %>% ggvis(~mpg, ~wt, size := size, opacity := opacity) %>%
  layer_points()