swgwon / canu

CANU

root파일 여는법

root filename.root

root console에서 파일 내용물 확인

.ls

ex)

root [1] .ls
TFile**		mock_data.root
 TFile*		mock_data.root
  KEY: TTree	tree;1	tree

또는

new TBrowser()

TTree 변수 확인, tree는 TTree이름

tree->Print()

ex)

root [1] tree->Print()
******************************************************************************
*Tree    :tree      : tree                                                   *
*Entries :   100000 : Total =         2811854 bytes  File  Size =    1895866 *
*        :          : Tree compression factor =   1.48                       *
******************************************************************************
*Br    0 :isSignal  : isSignal/O                                             *
*Entries :   100000 : Total  Size=     100791 bytes  File Size  =      22771 *
*Baskets :        4 : Basket Size=      32000 bytes  Compression=   4.40     *
*............................................................................*
*Br    1 :x1        : x1/f                                                   *
*Entries :   100000 : Total  Size=     301182 bytes  File Size  =     242109 *
*Baskets :       10 : Basket Size=      32000 bytes  Compression=   1.24     *
*............................................................................*

변수로 histogram그리기

tree->Draw("변수명")

ex)

tree->Draw("x1")