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FEDRA How To - Revision history
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https://wiki.lhep.unibe.ch/index.php?title=FEDRA_How_To&diff=194&oldid=prev
Lhep at 20:44, 29 May 2008
2008-05-29T20:44:24Z
<p></p>
<p><b>New page</b></p><div>* Some tips making [[Plots with ROOT]].<br />
<br />
* How to invert an affine transformation:<br />
- EdbAffine2D myaff<br />
- myaff.Set(float a11, float a12, float a21, float a22, float b1, float b2)<br />
- myaff.Invert()<br />
- myaff.Print()<br />
* How to merge root files<br />
- TChain *chain=new TChain("couples");<br />
- chain->AddFile("myfile_1");<br />
- chain->AddFile("myfile_2");<br />
- chain->AddFile("...");<br />
- chain->Merge("my_output_file");<br />
- chain->~TChain();</div>
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