Black Lives Matter. Please consider donating to Black Girls Code today.
https://www.blackgirlscode.com/

Dropdown Events in R

How to add dropdowns to R plots


New to Plotly?

Plotly is a free and open-source graphing library for R. We recommend you read our Getting Started guide for the latest installation or upgrade instructions, then move on to our Plotly Fundamentals tutorials or dive straight in to some Basic Charts tutorials.

Simple Dropdown Menu Example

library(plotly)
library(MASS)

covmat <- matrix(c(0.8, 0.4, 0.3, 0.8), nrow = 2, byrow = T)
df <- mvrnorm(n = 10000, c(0,0), Sigma = covmat)
df <- as.data.frame(df)

colnames(df) <- c("x", "y")
fig <- plot_ly(df, x = ~x, y = ~y, alpha = 0.3)
fig <- fig %>% add_markers(marker = list(line = list(color = "black", width = 1)))
fig <- fig %>% layout(
    title = "Drop down menus - Plot type",
    xaxis = list(domain = c(0.1, 1)),
    yaxis = list(title = "y"),
    updatemenus = list(
      list(
        y = 0.8,
        buttons = list(

          list(method = "restyle",
               args = list("type", "scatter"),
               label = "Scatter"),

          list(method = "restyle",
               args = list("type", "histogram2d"),
               label = "2D Histogram")))
    ))

fig

Add Two Dropdown Menus to Restyle Graph

library(plotly)

x <- seq(-2 * pi, 2 * pi, length.out = 1000)
df <- data.frame(x, y1 = sin(x), y2 = cos(x))

fig <- plot_ly(df, x = ~x)
fig <- fig %>% add_lines(y = ~y1, name = "A")
fig <- fig %>% add_lines(y = ~y2, name = "B", visible = F)
fig <- fig %>% layout(
    title = "Drop down menus - Styling",
    xaxis = list(domain = c(0.1, 1)),
    yaxis = list(title = "y"),
    updatemenus = list(
      list(
        y = 0.8,
        buttons = list(

          list(method = "restyle",
               args = list("line.color", "blue"),
               label = "Blue"),

          list(method = "restyle",
               args = list("line.color", "red"),
               label = "Red"))),

      list(
        y = 0.7,
        buttons = list(
          list(method = "restyle",
               args = list("visible", list(TRUE, FALSE)),
               label = "Sin"),

          list(method = "restyle",
               args = list("visible", list(FALSE, TRUE)),
               label = "Cos")))
    )
  )

fig

What About Dash?

Dash for R is an open-source framework for building analytical applications, with no Javascript required, and it is tightly integrated with the Plotly graphing library.

Learn about how to install Dash for R at https://dashr.plot.ly/installation.

Everywhere in this page that you see fig, you can display the same figure in a Dash for R application by passing it to the figure argument of the Graph component from the built-in dashCoreComponents package like this:

library(plotly)

fig <- plot_ly() 
# fig <- fig %>% add_trace( ... )
# fig <- fig %>% layout( ... ) 

library(dash)
library(dashCoreComponents)
library(dashHtmlComponents)

app <- Dash$new()
app$layout(
    htmlDiv(
        list(
            dccGraph(figure=fig) 
        )
     )
)

app$run_server(debug=TRUE, dev_tools_hot_reload=FALSE)