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README.md

@@ -19,12 +19,12 @@ It supports the following syntax and features:
       x2 = x2*15
 
       return (x2 - 5/(4*m.pi^2)*(x1^2) + 5/m.pi*x1 -6 )^2 + 10*(1-1/(8*m.pi))*m.cos(x1) +10
-  print( "z={0}".format( branin( ?[x1~[1,2]], ${x2 +1.23} | #.###)))
+  print( "z={0}".format( branin( ?[x1~[1,2]], ${?[x2] +1.23} | #.###)))
   ```
      * will identify input:
        * x1, expected to vary inside [1,2]
        * x2, expected to vary inside [0,1] (by default)
-     * replace `!{?x2 + 1.23 | #.###}` expression by its evaluation
+     * replace `${?[x2] + 1.23 | #.###}` expression by its evaluation
 
 * Output
   * file type supported: 'out.txt'