Update app.R

app.R

@@ -224,11 +224,15 @@ server <- function(input, output) {
   # Confusion Matrix
   output$confusionMatText <- renderPrint({
     
-    if (is.null(input$file1))
-      return(NULL)
+    file_path <- if (is.null(input$file1)) {
+      default_file_path
+    } else {
+      input$file1$datapath
+    }
+   
+    dataset <- readr::read_delim(file_path,delim='\t',progress = FALSE)
+
     
-    inFile <- input$file1
-    dataset <- readr::read_delim(inFile$datapath,delim='\t',progress = FALSE)
     predictions <- predict(model, dataset)
     cm<-caret::confusionMatrix(reference=as.factor(dataset$Activity),predictions,mode="everything")
     cm$overall
@@ -236,11 +240,12 @@ server <- function(input, output) {
   
   output$confusionMatPlot <- renderPlot({
     
-    if (is.null(input$file1))
-      return(NULL)
-    
-    inFile <- input$file1
-    dataset <- readr::read_delim(inFile$datapath,delim='\t')
+     file_path <- if (is.null(input$file1)) {
+      default_file_path
+    } else {
+      input$file1$datapath
+    }
+    dataset <- readr::read_delim(file_path,delim='\t')
     predictions <- predict(model, dataset)
     cm<-caret::confusionMatrix(reference=as.factor(dataset$Activity),predictions,mode="everything")