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--- root:custompdfsandworkspace [2012/01/28 15:52] – decianm
+++ root:custompdfsandworkspace [2012/04/25 20:07] – decianm
@@ Line 52: / Line 52: @@
  }
 </code>
+you need to define something like:
- you need to define something like:
 <code C>
+ RooExpAndGauss::RooExpAndGauss()
+ {
+   RooRealVar xRV("xRV","x", 0.0, 1.0);
+   RooRealVar sh_meanRV("sh_meanRV", "sh_mean", 0.0, 1.0);
+   RooRealVar sh_sigmaRV("sh_sigmaRV","sh_sigma", 0.0, 1.0);
+   RooRealVar sh_transRV("sh_transRV","sh_trans", 0.0, 1.0);
+   RooExpAndGauss("RooExpAndGauss", "RooExpAndGauss", xRV, sh_meanRV, sh_sigmaRV, sh_transRV);
+}
+</code>
+to initialize the member variables (which are use in the evaluate-method).
+You then can compile the class as all other private classes and add the library to you rootlogon to have it at hand.
+**Note:** Make sure you have set the number in "ClassDef(myClass, number)" to something larger than 0. Otherwise the class won't allow I/O.
+**Note:** Don't even think of using the constructor "x("x","x"this,other.x)" in the copy constructor of your class. It will compile but will ever let you wonder why it segfaults afterwards (http://root.cern.ch/phpBB3/viewtopic.php?f=15&t=12788)

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