diff --git a/Classes/Plots/Plot.swift b/Classes/Plots/Plot.swift
index 96b76bf..c6370ca 100644
--- a/Classes/Plots/Plot.swift
+++ b/Classes/Plots/Plot.swift
@@ -8,11 +8,7 @@ public enum PlotType {
 }
 
 open class Plot {
-    var identifier: String
-    
-    init() {
-        identifier = "Plot"
-    }
+    var identifier: String!
 }
 
 open class LinePlot : Plot {
@@ -93,9 +89,9 @@ open class LinePlot : Plot {
     private var fillLayer: FillDrawingLayer?
     private var gradientLayer: GradientDrawingLayer?
     
-    override init() {
+    init(identifier: String) {
         super.init()
-        self.identifier = "LinePlot"
+        self.identifier = identifier
     }
     
     func layers(forViewport viewport: CGRect) -> [ScrollableGraphViewDrawingLayer?] {
@@ -149,9 +145,9 @@ open class DataPointPlot : Plot {
     
     private var dataPointLayer: DataPointDrawingLayer?
     
-    override init() {
+    init(identifier: String) {
         super.init()
-        self.identifier = "DataPointPlot"
+        self.identifier = identifier
     }
     
     func layers(forViewport viewport: CGRect) -> [ScrollableGraphViewDrawingLayer?] {
@@ -190,9 +186,9 @@ open class BarPlot : Plot {
     
     private var barLayer: BarDrawingLayer?
     
-    override init() {
+    init(identifier: String) {
         super.init()
-        self.identifier = "BarPlot"
+        self.identifier = identifier
     }
     
     func layers(forViewport viewport: CGRect) -> [ScrollableGraphViewDrawingLayer?] {
diff --git a/graphview_example_code/GraphView/ViewController.swift b/graphview_example_code/GraphView/ViewController.swift
index f22f6f9..e1ff6f2 100644
--- a/graphview_example_code/GraphView/ViewController.swift
+++ b/graphview_example_code/GraphView/ViewController.swift
@@ -65,7 +65,7 @@ class ViewController: UIViewController {
         let graphView = ScrollableGraphView(frame: frame)
         
         // Setup the line plot.
-        let linePlot = LinePlot()
+        let linePlot = LinePlot(identifier: "line")
         
         linePlot.lineWidth = 1
         linePlot.lineColor = UIColor.colorFromHex(hexString: "#777777")
@@ -77,7 +77,7 @@ class ViewController: UIViewController {
         linePlot.fillGradientStartColor = UIColor.colorFromHex(hexString: "#555555")
         linePlot.fillGradientEndColor = UIColor.colorFromHex(hexString: "#444444")
         
-        let dotPlot = DataPointPlot() // Add dots as well.
+        let dotPlot = DataPointPlot(identifier: "dot") // Add dots as well.
         dotPlot.dataPointSize = 2
         dotPlot.dataPointFillColor = UIColor.white
 
@@ -115,7 +115,7 @@ class ViewController: UIViewController {
         let graphView = ScrollableGraphView(frame:frame)
         
         // Setup the plot
-        let barPlot = BarPlot()
+        let barPlot = BarPlot(identifier: "bar")
         
         barPlot.shouldDrawBarLayer = true
         barPlot.barWidth = 25
@@ -153,7 +153,7 @@ class ViewController: UIViewController {
         let graphView = ScrollableGraphView(frame:frame)
         
         // Setup the plot
-        let plot = DataPointPlot()
+        let plot = DataPointPlot(identifier: "dot")
         
         plot.dataPointSize = 5
         plot.dataPointFillColor = UIColor.white
@@ -185,7 +185,7 @@ class ViewController: UIViewController {
         let graphView = ScrollableGraphView(frame:frame)
         
         // Setup the plot
-        let linePlot = LinePlot()
+        let linePlot = LinePlot(identifier: "line")
         
         linePlot.lineColor = UIColor.clear
         linePlot.shouldFill = true