Created
October 12, 2020 20:27
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app example
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| library(whereami) | |
| library(ggplot2) | |
| if(!file.exists('cars.csv')){ | |
| readr::write_csv(mtcars,path = 'cars.csv') | |
| } | |
| # Define the UI | |
| ui <- fluidPage( | |
| sidebarLayout( | |
| sidebarPanel( | |
| fileInput("file1", "Choose CSV File", | |
| accept = c( | |
| "text/csv", | |
| "text/comma-separated-values,text/plain", | |
| ".csv") | |
| ), | |
| tags$hr(), | |
| shiny::uiOutput('xcol'), | |
| shiny::uiOutput('ycol') | |
| ), | |
| mainPanel( | |
| shiny::plotOutput('plot') | |
| ) | |
| ) | |
| ) | |
| # Define the server code | |
| server <- function(input, output) { | |
| dat <- eventReactive(input$file1,{ | |
| inFile <- input$file1 | |
| if (is.null(inFile)) | |
| return(NULL) | |
| read.csv(inFile$datapath) | |
| }) | |
| output$xcol <- renderUI({ | |
| this_dat <- dat() | |
| shiny::selectizeInput( | |
| inputId = 'x', | |
| label = 'Select Column', | |
| choices = names(this_dat), | |
| selected = names(this_dat)[1] | |
| ) | |
| }) | |
| output$ycol <- renderUI({ | |
| this_dat <- dat() | |
| shiny::selectizeInput( | |
| inputId = 'y', | |
| label = 'Select Column', | |
| choices = names(this_dat), | |
| selected = names(this_dat)[1] | |
| ) | |
| }) | |
| output$plot <- shiny::renderPlot({ | |
| whereami::cat_where(whereami::whereami(tag = 'hist')) | |
| dat()%>% | |
| ggplot(aes(x = !!rlang::sym(input$x), y = !!rlang::sym(input$y))) + geom_point() | |
| }) | |
| } | |
| # Return a Shiny app object | |
| shinyApp(ui = ui, server = server) |
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