How can I customise the text output in a verbatimTextOuput function within a Shiny interactive plot in R










1















I want to change the text output to show specific information about the plot point being hovered over such as name and value and such, but I cant seem to workout how to alter the VerbatimTextOutput and what it currently show is not of much use for a quick glace of information. This is the code I am using:



```



 ui <- fluidPage(
fluidRow(

column(width = 8, class = "well",
h4("Brush to select region. Left plot controls right plot"),
fluidRow(
column(width = 12,
plotOutput("plot2", height = 300,
brush = brushOpts(
id = "plot2_brush",
resetOnNew = TRUE
)
)
),
column(width = 12,
plotOutput("plot3", height = 300, hover = hoverOpts(id = "plot_hover"))
)
)
),
column(width = 3,
verbatimTextOutput("hover_info", placeholder = TRUE))
)
)


server <- function(input, output)
# Linked plots (middle and right)
ranges2 <- reactiveValues(x = NULL, y = NULL)

output$plot2 <- renderPlot(
ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
geom_point()+
theme(legend.position = "none")
)

output$plot3 <- renderPlot(
ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
geom_point() +
coord_cartesian(xlim = ranges2$x, ylim = ranges2$y, expand = FALSE)
)

output$hover_info = renderPrint(
cat("Gene info:n")
str(input$plot_hover)
)
output$placeholder = renderTe

# When a double-click happens, check if there's a brush on the plot.
# If so, zoom to the brush bounds; if not, reset the zoom.
observe(
brush <- input$plot2_brush
if (!is.null(brush))
ranges2$x <- c(brush$xmin, brush$xmax)
ranges2$y <- c(brush$ymin, brush$ymax)

else
ranges2$x <- NULL
ranges2$y <- NULL

)



shinyApp(ui, server)


```










share|improve this question




























    1















    I want to change the text output to show specific information about the plot point being hovered over such as name and value and such, but I cant seem to workout how to alter the VerbatimTextOutput and what it currently show is not of much use for a quick glace of information. This is the code I am using:



    ```



     ui <- fluidPage(
    fluidRow(

    column(width = 8, class = "well",
    h4("Brush to select region. Left plot controls right plot"),
    fluidRow(
    column(width = 12,
    plotOutput("plot2", height = 300,
    brush = brushOpts(
    id = "plot2_brush",
    resetOnNew = TRUE
    )
    )
    ),
    column(width = 12,
    plotOutput("plot3", height = 300, hover = hoverOpts(id = "plot_hover"))
    )
    )
    ),
    column(width = 3,
    verbatimTextOutput("hover_info", placeholder = TRUE))
    )
    )


    server <- function(input, output)
    # Linked plots (middle and right)
    ranges2 <- reactiveValues(x = NULL, y = NULL)

    output$plot2 <- renderPlot(
    ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
    geom_point()+
    theme(legend.position = "none")
    )

    output$plot3 <- renderPlot(
    ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
    geom_point() +
    coord_cartesian(xlim = ranges2$x, ylim = ranges2$y, expand = FALSE)
    )

    output$hover_info = renderPrint(
    cat("Gene info:n")
    str(input$plot_hover)
    )
    output$placeholder = renderTe

    # When a double-click happens, check if there's a brush on the plot.
    # If so, zoom to the brush bounds; if not, reset the zoom.
    observe(
    brush <- input$plot2_brush
    if (!is.null(brush))
    ranges2$x <- c(brush$xmin, brush$xmax)
    ranges2$y <- c(brush$ymin, brush$ymax)

    else
    ranges2$x <- NULL
    ranges2$y <- NULL

    )



    shinyApp(ui, server)


    ```










    share|improve this question


























      1












      1








      1








      I want to change the text output to show specific information about the plot point being hovered over such as name and value and such, but I cant seem to workout how to alter the VerbatimTextOutput and what it currently show is not of much use for a quick glace of information. This is the code I am using:



      ```



       ui <- fluidPage(
      fluidRow(

      column(width = 8, class = "well",
      h4("Brush to select region. Left plot controls right plot"),
      fluidRow(
      column(width = 12,
      plotOutput("plot2", height = 300,
      brush = brushOpts(
      id = "plot2_brush",
      resetOnNew = TRUE
      )
      )
      ),
      column(width = 12,
      plotOutput("plot3", height = 300, hover = hoverOpts(id = "plot_hover"))
      )
      )
      ),
      column(width = 3,
      verbatimTextOutput("hover_info", placeholder = TRUE))
      )
      )


      server <- function(input, output)
      # Linked plots (middle and right)
      ranges2 <- reactiveValues(x = NULL, y = NULL)

      output$plot2 <- renderPlot(
      ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
      geom_point()+
      theme(legend.position = "none")
      )

      output$plot3 <- renderPlot(
      ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
      geom_point() +
      coord_cartesian(xlim = ranges2$x, ylim = ranges2$y, expand = FALSE)
      )

      output$hover_info = renderPrint(
      cat("Gene info:n")
      str(input$plot_hover)
      )
      output$placeholder = renderTe

      # When a double-click happens, check if there's a brush on the plot.
      # If so, zoom to the brush bounds; if not, reset the zoom.
      observe(
      brush <- input$plot2_brush
      if (!is.null(brush))
      ranges2$x <- c(brush$xmin, brush$xmax)
      ranges2$y <- c(brush$ymin, brush$ymax)

      else
      ranges2$x <- NULL
      ranges2$y <- NULL

      )



      shinyApp(ui, server)


      ```










      share|improve this question
















      I want to change the text output to show specific information about the plot point being hovered over such as name and value and such, but I cant seem to workout how to alter the VerbatimTextOutput and what it currently show is not of much use for a quick glace of information. This is the code I am using:



      ```



       ui <- fluidPage(
      fluidRow(

      column(width = 8, class = "well",
      h4("Brush to select region. Left plot controls right plot"),
      fluidRow(
      column(width = 12,
      plotOutput("plot2", height = 300,
      brush = brushOpts(
      id = "plot2_brush",
      resetOnNew = TRUE
      )
      )
      ),
      column(width = 12,
      plotOutput("plot3", height = 300, hover = hoverOpts(id = "plot_hover"))
      )
      )
      ),
      column(width = 3,
      verbatimTextOutput("hover_info", placeholder = TRUE))
      )
      )


      server <- function(input, output)
      # Linked plots (middle and right)
      ranges2 <- reactiveValues(x = NULL, y = NULL)

      output$plot2 <- renderPlot(
      ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
      geom_point()+
      theme(legend.position = "none")
      )

      output$plot3 <- renderPlot(
      ggplot(adj_p_val_df, aes(x = Genes, y = p_value, col = Model))+
      geom_point() +
      coord_cartesian(xlim = ranges2$x, ylim = ranges2$y, expand = FALSE)
      )

      output$hover_info = renderPrint(
      cat("Gene info:n")
      str(input$plot_hover)
      )
      output$placeholder = renderTe

      # When a double-click happens, check if there's a brush on the plot.
      # If so, zoom to the brush bounds; if not, reset the zoom.
      observe(
      brush <- input$plot2_brush
      if (!is.null(brush))
      ranges2$x <- c(brush$xmin, brush$xmax)
      ranges2$y <- c(brush$ymin, brush$ymax)

      else
      ranges2$x <- NULL
      ranges2$y <- NULL

      )



      shinyApp(ui, server)


      ```







      r shiny






      share|improve this question















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      share|improve this question




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      edited Nov 14 '18 at 20:24







      Rob

















      asked Nov 14 '18 at 20:17









      RobRob

      62




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