shiny (version 0.10.2.1)

makeReactiveBinding: Make a reactive variable

Description

Turns a normal variable into a reactive variable, that is, one that has reactive semantics when assigned or read in the usual ways. The variable may already exist; if so, its value will be used as the initial value of the reactive variable (or NULL if the variable did not exist).

Usage

makeReactiveBinding(symbol, env = parent.frame())

Arguments

symbol
A character string indicating the name of the variable that should be made reactive
env
The environment that will contain the reactive variable

Value

  • None.

Examples

Run this code
a <- 10
makeReactiveBinding("a")
b <- reactive(a * -1)
observe(print(b()))
a <- 20

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