safe_ggplot: Safely render a 'ggplot' in Shiny application

In dtsonipmph/esquisse: Explore and Visualize Your Data Interactively

Description

Safely render a ggplot in Shiny application

Usage

safe_ggplot(expr, data = NULL, session = shiny::getDefaultReactiveDomain())

Arguments

expr	Code to produce a ggplot object.
data	Argument passed to eval_tidy to evaluate expression.
session	Session object to send notification to.

Value

Output of ggplot_build.

Examples

if (interactive()) {
  library(shiny)
  library(ggplot2)
  
  ui <- fluidPage(
    fluidRow(
      column(
        width = 3,
        selectInput(
          inputId = "var", 
          label = "Var:", 
          choices = c("Sepal.Width", "Do.Not.Exist")
        )
      ),
      column(
        width = 9,
        plotOutput(outputId = "plot")
      )
    )
  )
  
  server <- function(input, output, session) {
    
    output$plot <- renderPlot({
      p <- ggplot(iris) +
        geom_point(aes_string("Sepal.Length", input$var))
      safe_ggplot(p)
    })
    
  }
  
  shinyApp(ui, server)
}

dtsonipmph/esquisse documentation built on Sept. 14, 2020, 9:34 a.m.