Add score distribution plot

DESCRIPTION

@@ -23,5 +23,6 @@ Imports:
     bslib,
     data.table,
     DT,
+    plotly,
     glue,
     shiny

R/server.R

@@ -21,9 +21,52 @@ server <- function(input, output) {
         data
     })
 
+    output$scores_plot <- plotly::renderPlotly(scores_plot(ranked_data()))
     output$ranked_data <- DT::renderDataTable(genes_table(ranked_data()))
 }
 
+#' Create plot showing the distribution of scores using `plotly`.
+#'
+#' @param ranked_data Data on genes with precomputed ranks.
+#' @param ranks How may ranks the x-axis should include. If this parameter is
+#'   `NULL`, all ranks will be shown.
+#'
+#' @return A `plotly` figure for rendering.
+#' @noRd
+scores_plot <- function(ranked_data, ranks = 1000) {
+    data <- if (is.null(ranks)) {
+        ranked_data
+    } else {
+        ranked_data[1:ranks]
+    }
+
+    ranks_label <- if (is.null(ranks)) {
+        "Ranks"
+    } else {
+        glue::glue("Ranks (1 to {ranks})")
+    }
+
+    plotly::plot_ly() |>
+        plotly::add_markers(
+            data = data,
+            x = ~rank,
+            y = ~score,
+            text = ~hgnc_name,
+            customdata = ~percentile,
+            hovertemplate = paste0(
+                "<b>%{text}</b><br>",
+                "Rank: %{x}<br>",
+                "Score: %{y:.2}<br>",
+                "Percentile: %{customdata:.2%}",
+                "<extra></extra>"
+            )
+        ) |>
+        plotly::layout(
+            xaxis = list(title = ranks_label),
+            yaxis = list(title = "Score")
+        )
+}
+
 #' Create a displayable data table from the gene results data.
 #' @noRd
 genes_table <- function(data) {

R/ui.R

@@ -41,9 +41,19 @@ ui <- function() {
                 ),
                 mainPanel(
                     width = 9,
+                    tabsetPanel(
+                        type = "pills",
+                        tabPanel(
+                            title = "Distribution of scores",
+                            plotly::plotlyOutput("scores_plot")
+                        ),
+                        tabPanel(
+                            title = "Detailed results",
                             DT::dataTableOutput("ranked_data")
                         )
                     )
+                )
+            )
         ),
         tabPanel(
             title = "Help"