diff --git a/doc/src/examples-donutbreakdown.qdoc b/doc/src/examples-donutbreakdown.qdoc
index 442bd9b..2358862 100644
--- a/doc/src/examples-donutbreakdown.qdoc
+++ b/doc/src/examples-donutbreakdown.qdoc
@@ -10,7 +10,7 @@
 
      \snippet ../examples/donutbreakdown/main.cpp 1
 
-     Then we create a chart where we add the data. Note that this this is our own chart derived from QChart.
+     Then we create a chart where we add the data. Note that this is our own chart derived from QChart.
 
      \snippet ../examples/donutbreakdown/main.cpp 2
 
diff --git a/doc/src/examples-linechart.qdoc b/doc/src/examples-linechart.qdoc
index 2f78871..25979b5 100644
--- a/doc/src/examples-linechart.qdoc
+++ b/doc/src/examples-linechart.qdoc
@@ -11,7 +11,7 @@
 
     \snippet ../examples/linechart/main.cpp 1
 
-    Then we add data to series. We can use add() member function or use stream operator.  
+    Then we add data to series. We can use append() member function or use stream operator.  
 
     \snippet ../examples/linechart/main.cpp 2
 
diff --git a/doc/src/examples-scatterchart.qdoc b/doc/src/examples-scatterchart.qdoc
index d9ae600..eaa72c8 100644
--- a/doc/src/examples-scatterchart.qdoc
+++ b/doc/src/examples-scatterchart.qdoc
@@ -11,7 +11,7 @@
 
     \snippet ../examples/scatterchart/chartview.cpp 1
 
-    We add data to be shown. We can use add() member function or use stream operator.  
+    We add data to be shown. We can use append() member function or use stream operator.  
 
     \snippet ../examples/scatterchart/chartview.cpp 2