Tutorial page 3: add more cwise operations, condense rest.

doc/examples/Tutorial_ArrayClass_accessors.cpp

@@ -8,17 +8,17 @@ int main()
 {
   ArrayXXf  m(2,2);
   
-  //assign some values coefficient by coefficient
+  // assign some values coefficient by coefficient
   m(0,0) = 1.0; m(0,1) = 2.0;
-  m(1,0) = 3.0; m(1,1) = 4.0;
+  m(1,0) = 3.0; m(1,1) = m(0,1) + m(1,0);
   
-  //print values to standard output
+  // print values to standard output
   cout << m << endl << endl;
  
   // using the comma-initializer is also allowed
   m << 1.0,2.0,
        3.0,4.0;
      
-  //print values to standard output
+  // print values to standard output
   cout << m << endl;
 }