Create server.R

server.R

@@ -0,0 +1,23 @@
+function(input, output, session) {
+
+  # Combine the selected variables into a new data frame
+  selectedData <- reactive({
+    iris[, c(input$xcol, input$ycol)]
+  })
+
+  clusters <- reactive({
+    kmeans(selectedData(), input$clusters)
+  })
+
+  output$plot1 <- renderPlot({
+    palette(c("#E41A1C", "#377EB8", "#4DAF4A", "#984EA3",
+      "#FF7F00", "#FFFF33", "#A65628", "#F781BF", "#999999"))
+
+    par(mar = c(5.1, 4.1, 0, 1))
+    plot(selectedData(),
+         col = clusters()$cluster,
+         pch = 20, cex = 3)
+    points(clusters()$centers, pch = 4, cex = 4, lwd = 4)
+  })
+
+}