Shiny Concepts Without Runtime

Input State

Choose a Control

A Shiny app keeps user input values in a named input object.

Program

Play the script to choose a modeled input control and see the current value label.

input_state.R 
input_index <- 
controls <- c("slider", "select", "checkbox")
values <- c("10", "north", "TRUE")
control <- controls[input_index]
value <- values[input_index]
label <- paste(control, value, sep = ":")
cat(label, "\n", sep = "")

input_index <- 
controls <- c("slider", "select", "checkbox")
values <- c("10", "north", "TRUE")
control <- controls[input_index]
value <- values[input_index]
label <- paste(control, value, sep = ":")
cat(label, "\n", sep = "")

input_index <- 
controls <- c("slider", "select", "checkbox")
values <- c("10", "north", "TRUE")
control <- controls[input_index]
value <- values[input_index]
label <- paste(control, value, sep = ":")
cat(label, "\n", sep = "")
input state A modeled input has a control name and a current value.
selection Indexing vectors lets one small script represent several controls.
label The label makes the selected input state visible without running Shiny.