Added pie chart

Server/DataProcessor.R

@@ -0,0 +1,22 @@
+#
+# DATA PROCESSING
+#
+
+# Functions
+getMatchesList <- function(first_team, second_team, football_data) {
+  matches <- football_data %>%
+    filter(home_team %in% c(first_team, second_team)
+           & away_team %in% c(first_team, second_team))
+  return(matches)
+}
+
+getBalance <- function(football_data) {
+  balance <- football_data %>%
+    count(winner, sort = TRUE)
+  return(balance)
+}
+
+getBalancePercentage <- function(balance) {
+  balancePerc <- balance %>%
+    mutate(percentage = n/sum(.$n) * 100)
+}

Server/Results.R

@@ -1,16 +1,6 @@
-# Functions
-getMatchesList <- function(first_team, second_team, football_data) {
-  matches <- football_data %>%
-    filter(home_team %in% c(first_team, second_team)
-           & away_team %in% c(first_team, second_team))
-  return(matches)
-}
-
-getBalance <- function(football_data) {
-  balance <- football_data %>%
-    count(winner, sort = TRUE)
-  return(balance)
-}
+#
+# RESULTS
+#
 
 # Results with pagination
 resultsWithPagination <- function(input, output) {
@@ -29,10 +19,26 @@ resultsWithPagination <- function(input, output) {
 balanceBetweenTeams <- function(input, output) {
   output$balance <- renderPlot({
     barplot(
-      bal <- getBalance(getMatchesList(input$first_team, input$second_team, football_data_ext))$n,
+      getBalance(getMatchesList(input$first_team, input$second_team, football_data_ext))$n,
       main = "Balance between teams",
       col = rainbow(3),
       names.arg = getBalance(getMatchesList(input$first_team, input$second_team, football_data_ext))$winner
     )
   })
 }
+
+# Balance percentage
+balancePercentage <- function(input, output) {
+  output$balancePieChart <- renderPlot({
+    pie(
+      getBalancePercentage(
+        getBalance(getMatchesList(input$first_team, input$second_team, football_data_ext))
+      )$percentage,
+      main = "Match balance (percentage)",
+      labels = getBalancePercentage(
+        getBalance(getMatchesList(input$first_team, input$second_team, football_data_ext))
+      )$winner,
+      col = rainbow(3)
+    )
+  })
+}

Server/main.R

@@ -4,9 +4,11 @@
 
 # Import files
 source("Server/Results.R")
+source("Server/DataProcessor.R")
 
 # Server logic
 server <- function(input, output) {
   balanceBetweenTeams(input, output)
+  balancePercentage(input, output)
   resultsWithPagination(input, output)
 }

UI/main.R

@@ -7,6 +7,7 @@ source("UI/SidebarPanel.R")
 
 # UI
 ui <- fluidPage(
+  theme = shinytheme("slate"),
   
   # Application title
   titlePanel("International football results 1872-2018"),
@@ -18,6 +19,7 @@ ui <- fluidPage(
     # Main panel
     mainPanel(
       plotOutput("balance"),
+      plotOutput("balancePieChart"),
       DT::dataTableOutput("results_pagination")
     )
   )

app.R

@@ -9,6 +9,7 @@
 
 library(shiny)
 library(dplyr)
+library(shinythemes)
 
 # Load files
 source("Data/Loader.R")