diff --git a/doc/src/example-linechart.qdoc b/doc/src/example-linechart.qdoc
index c426653..3fac9dc 100644
--- a/doc/src/example-linechart.qdoc
+++ b/doc/src/example-linechart.qdoc
@@ -11,7 +11,7 @@
 
     \snippet ../example/linechart/main.cpp 1
 
-    We add data to be shown to both series. 
+    We add data to be shown to both series. We can use add() member function or use stream operator.  
 
     \snippet ../example/linechart/main.cpp 2
 
diff --git a/example/linechart/main.cpp b/example/linechart/main.cpp
index 6f279bc..9485d9e 100644
--- a/example/linechart/main.cpp
+++ b/example/linechart/main.cpp
@@ -31,11 +31,7 @@ int main(int argc, char *argv[])
     series0->add(7, 4);
     series0->add(10,5);
 
-    series1->add(1, 1);
-    series1->add(3, 3);
-    series1->add(7, 6);
-    series1->add(8, 3);
-    series1->add(10,2);
+    *series1 << QPointF(1, 1) << QPointF(3, 3) << QPointF(7, 6) << QPointF(8, 3) << QPointF(10,2);
 //![2]
 //![3]
     QMainWindow window;
diff --git a/src/linechart/qlineseries.cpp b/src/linechart/qlineseries.cpp
index 4d32bbe..0b0cab1 100644
--- a/src/linechart/qlineseries.cpp
+++ b/src/linechart/qlineseries.cpp
@@ -68,6 +68,7 @@ QLineSeries::~QLineSeries()
  */
 void QLineSeries::add(qreal x,qreal y)
 {
+    Q_ASSERT(m_x.size() == m_y.size());
     m_x<<x;
     m_y<<y;
 }
@@ -185,6 +186,17 @@ QDebug operator<< (QDebug debug, const QLineSeries series)
     return debug.space();
 }
 
+/*!
+    Stream operator for adding a data \a point to the series.
+    \sa add()
+*/
+
+QLineSeries& QLineSeries::operator<< (const QPointF &point)
+{
+    add(point);
+    return *this;
+}
+
 
 #include "moc_qlineseries.cpp"
 
diff --git a/src/linechart/qlineseries.h b/src/linechart/qlineseries.h
index 14acba7..bb219df 100644
--- a/src/linechart/qlineseries.h
+++ b/src/linechart/qlineseries.h
@@ -35,8 +35,11 @@ public: // from QChartSeries
     int count() const;
     qreal x(int pos) const;
     qreal y(int pos) const;
+
+    QLineSeries& operator << (const QPointF &point);
     friend QDebug operator<< (QDebug d, const QLineSeries series);
 
+
 signals:
     void changed(int index);