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Akiya Miyamoto, KEK


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Akiya Miyamoto, KEK



Akiya Miyamoto, KEK



Akiya Miyamoto, KEK

Introduction to ROOT, Akiya Miyamoto

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Introduction to ROOT, Akiya Miyamoto 26-May-2003 Introduction to ROOT, Akiya Miyamoto 26-May-2003


26-May-2003

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1. Overview of the ROOT Framework2. GUI basics3. Command line basics4. Root Commands and CINT5. Examples of Histograms, Functions and Fitting6. How to add your Own Class








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( What about PAW

( Concepts: Object Oriented Design, Frameworks

( Services and Utilities

( Libraries

( Physical Organization


What about PAWConcepts: Object Oriented Design, FrameworksServices and UtilitiesLibraries Physical Organization






)26-May-2003

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- Members: a “has a” relationship to the class.

- Inheritance: an “is a” relationship to the class.

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TrackSegment Vertex

Momentum MassSquare InterceptAtVert

HAS AHAS AHAS A

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- Members: a “has a” relationship to the class.

- Inheritance: an “is a” relationship to the class.

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Event

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HAS AHAS AHAS A

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TObject

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Members: a “has a” relationship to the class.Inheritance: an “is a” relationship to the class.

Event

TrackSegment Vertex


HAS AHAS AHAS A

HAS A HAS AHAS A

TObject

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Members: a “has a” relationship to the class.Inheritance: an “is a” relationship to the class.

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Introduction to ROOT, Akiya Miyamoto 26-May-2003 Introduction to ROOT, Akiya Miyamoto 26-May-2003


c26-May-2003

d e f g f h f g f

-Histogramming and Fitting

-Graphics (2D, 3D)

-I/O to file or socket: specialized for histograms, Ntuples (Trees)

-Collection Classes and Run Time Type Identification

-User Interface

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-Collection Classes and Run Time Type Identification

-User Interface

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Histogramming and FittingGraphics (2D, 3D)I/O to file or socket: specialized for histograms, Ntuples (Trees)Collection Classes and Run Time Type IdentificationUser Interface

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Histogramming and FittingGraphics (2D, 3D)I/O to file or socket: specialized for histograms, Ntuples (Trees)Collection Classes and Run Time Type IdentificationUser Interface

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�26-May-2003

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� Over 350 classes

� Core

� CINT

� Libraries loaded at startup: Hist, Tree …

� Libraries loaded when needed: HistPainter, TreePlayer,…

� Special purpose libraries: EG, Physics…


Over 350 classes

CoreCINTLibraries loaded at startup: Hist, Tree …Libraries loaded when needed: HistPainter, TreePlayer,…Special purpose libraries: EG, Physics…


Over 350 classes



Over 350 classes



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*.h...

cintmakecintnewproofdproofservrmkdependrootroot.exerootcintroot-configrootd

bin

$ROOTSYS

libCint.solibCore.solibEG.so*libEGPythia.so*libEGPythia6.solibEGVenus.solibGpad.solibGraf.solibGraf3d.solibGui.solibGX11.so*libGX11TTF.solibHist.solibHistPainter.solibHtml.solibMatrix.solibMinuit.solibNew.solibPhysics.solibPostscript.solibProof.so*libRFIO.so*libRGL.solibRint.so*libThread.solibTree.solibTreePlayer.solibTreeViewer.so*libttf.solibX3d.solibXpm.a

Aclock.cxxAclock.hEvent.cxxEvent.hEventLinkDef.hHello.cxxHello.hMainEvent.cxxMakefileMakefile.inMakefile.win32READMETestVectors.cxxTetris.cxxTetris.heventa.cxxeventb.cxxeventload.cxxguitest.cxxhsimple.cxxhworld.cxxminexam.cxxstress.cxxtcollbm.cxxtcollex.cxxtest2html.cxxtstring.cxxvlazy.cxxvmatrix.cxxvvector.cxx

lib testtutorials include

* OptionalInstallation

EditorBar.CIfit.Canalyze.Carchi.Carrow.Cbasic.Cbasic.datbasic3d.Cbenchmarks.Ccanvas.Cclasscat.Ccleanup.Ccompile.Ccopytree.Ccopytree2.Cdemos.Cdemoshelp.Cdialogs.Cdirs.Cellipse.Ceval.Cevent.Cexec1.Cexec2.Cfeynman.Cfildir.Cfile.Cfillrandom.Cfirst.Cfit1.Cfit1_C.C

fitslicesy.Cformula1.Cframework.Cgames.Cgaxis.Cgeometry.Cgerrors.Cgerrors2.Cgraph.Ch1draw.Chadd.Chclient.Chcons.Chprod.Chserv.Chserv2.Chsimple.Chsum.ChsumTimer.Chtmlex.Cio.Clatex.Clatex2.Clatex3.Cmanyaxis.Cmultifit.Cmyfit.Cna49.Cna49geomfile.Cna49view.Cna49visible.C

ntuple1.Coldbenchmarks.Cpdg.datpsexam.Cpstable.Crootalias.Crootenv.Crootlogoff.Crootlogon.Crootmarks.Cruncatalog.sqlrunzdemo.Csecond.Cshapes.Cshared.Csplines.Csqlcreatedb.Csqlfilldb.Csqlselect.Cstaff.Cstaff.datsurfaces.Ctcl.Ctestrandom.Ctornado.Ctree.Ctwo.Cxyslider.CxysliderAction.Czdemo.C


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� Root Command lineCINT (C++ interpreter)

� Macros, applications, libraries (C++ compiler and interpreter)

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¤ Regular grammar (C++) on command line

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¤ Object Oriented (use your class in the interpreter)

¤ Advanced Interactive User Interface

¤ Well Documented code. HTML class descriptions for every class.

¤ Object I/O including Schema Evolution

¤ 3-d interfaces with OpenGL and X3D.


Regular grammar (C++) on command lineSingle language (compiled and interpreted)Object Oriented (use your class in the interpreter)Advanced Interactive User InterfaceWell Documented code. HTML class descriptions for every class.Object I/O including Schema Evolution3-d interfaces with OpenGL and X3D.






¥¦26-May-2003

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Get the example PAW file fromhttp://www-root.fnal.gov/root/class/examples/toyz.rz

® At the system prompt type

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a ROOT session and open toyz.root

º Also see: http://root.cern.ch/root/HowtoConvert.html

open terminal



At the system prompt type

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open terminal







open terminal







open terminal


»¼26-May-2003

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PAWConcepts: Object Oriented Design, FrameworksServices and UtilitiesLibraries Physical Organization






ÄÅ26-May-2003

Æ Ç

È Browsing and opening files

É Drawing histograms

Ê Right click, left click, middle click

Ë Draw Panel

Ì Fit Panel

Í Adding Color and Zooming

Î Adding text and other objects

Ï Dividing the canvas

Ð Setting the log scale


Browsing and opening filesDrawing histogramsRight click, left click, middle clickDraw PanelFit PanelAdding Color and ZoomingAdding text and other objectsDividing the canvasSetting the log scale






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run root


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run root


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Display a histogram The Canvas









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Adding a gaussian fitColoring the histogramZooming/unzooming






ab26-May-2003

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f Adding an Arrow

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hi26-May-2003

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n Select the new Pad

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q q26-May-2003

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The Canvas in the BrowserSetting the (7) statistics optionsdefault = 0001111






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Use emacs commands to navigate








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Where did myTree come from?

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And now..


Plot a variable


And now..


hi26-May-2003

j k

l A TFile is a directory structure like UNIX

m Object in Memory (OBJ) Object on Disk (KEY)


n A TFile is a directory structure like UNIX

o Object in Memory (OBJ) Object on Disk (KEY)


A TFile is a directory structure like UNIXObject in Memory (OBJ) Object on Disk (KEY)


A TFile is a directory structure like UNIXObject in Memory (OBJ) Object on Disk (KEY)


pq26-May-2003

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Stores large quantities of same class objects:

TNtuple is a TTree limited to floating point numbers.More details later …








¦§26-May-2003

¨ ¨

© Open and browse a file

ª Drawing histograms

« Adding a Fit

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Open and browse a fileDrawing histogramsAdding a FitAdding Error barsAdding Color






®¯26-May-2003

°

± Overview of ROOT

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´ Using the Class reference guide

µ PAW to ROOT conversion


¶ Overview of ROOT

· GUI Basics

¸ Command line basics

¹ Using the Class reference guide

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Overview of ROOTGUI BasicsCommand line basicsUsing the Class reference guidePAW to ROOT conversion


Overview of ROOTGUI BasicsCommand line basicsUsing the Class reference guidePAW to ROOT conversion


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Last time

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Introduction to ROOT, Akiya Miyamoto 26-May-2003�� Environment Settings

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Introduction to ROOT, Akiya Miyamoto 26-May-2003��Environment setting file: � ��

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Environment setting file:

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open terminal


Environment setting file:

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Options in .rootrc

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The .rootrc file:The Macro Path

Options in .rootrc

History File

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CINT commands start with “.”

SHELL commands start with “.!” for example:


CINT commands start with “.”

SHELL commands start with “.!” for example:


8926-May-2003:<;= >?A@ >B BCD

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EF F G HI J KL E F M NO E P Q R SO M KL E F M NO E TU

F EEF F G HI J KL E F M NO E P Q R SO M KL E F M NO E TU VThe optional Semicolon:Leave off the semicolon to see the return value of the command.WX X Y Z[ \ ]^ _ ` a a b cX d We Ygf Wh i j kf elm n o pq r

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The optional Semicolon:Leave off the semicolon to see the return value of the command.








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Find List of MethodsFind Parameter list








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Introduction to ROOT, Akiya Miyamoto 26-May-2003Ä

Based on Taligent

Å Classes begin with T TTree, TBrowserÆ Non-class types end with _t Int_t Ç Data members begin with f fTree È Member functions begin with a capital Loop() É Constants begin with k kInitialSize, kRed Ê Static variables begin with g gEnv Ë Static data members begin with fg fgTokenClient


Based on TaligentClasses begin with T TTree, TBrowserNon-class types end with _t Int_t Data members begin with f fTree Member functions begin with a capital Loop() Constants begin with k kInitialSize, kRed Static variables begin with g gEnv Static data members begin with fg fgTokenClient


Based on TaligentClasses begin with T TTree, TBrowserNon-class types end with _t Int_t Data members begin with f fTree Member functions begin with a capital Loop() Constants begin with k kInitialSize, kRed Static variables begin with g gEnv Static data members begin with fg fgTokenClient


Ì Í26-May-2003Î<ÏÐ ÑÒAÓ ÑÔ ÔÕÖ

C++ type Size (bytes) ROOT types Size(bytes)

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(unsigned)char 1 (U)Char_t 1 CHARACTER*1

(unsigned)short(int)

2 (U)Short_t 2 INTEGER*2

(unsigned)int 2 or 4 (U)Int_t 4 INTEGER*4

(unsigned)long(int)

4 or 8 (U)Long_t 8 INTEGER*8

float 4 Float_t 4 REAL*4

double 8 (=4) Double_t 8 REAL*8

long double16 (=

double)REAL*16

Introduction to ROOT, Akiya Miyamoto 26-May-2003×

C++ type Size (bytes) ROOT types Size(bytes)

FORTRAN analog





(unsigned)long(int)




long double16 (=

double)REAL*16


C++ type Size (bytes) ROOT typesSize

(bytes) FORTRAN analog





(unsigned)long(int)




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C++ type Size (bytes) ROOT typesSize

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@ [expression] evaluates the expression

AB B C DE F E GH

IJ K L MN O

P .files show loaded source files

Q .class [name] show class definition

R .g prints all objects in the root session

S .ls ls on current directory

T .pwd list the current directory, canvas, and style.

U .![shell-command] execute shell commandIntroduction to ROOT, Akiya Miyamoto 26-May-2003V

W [expression] evaluates the expression

X .files show loaded source files

Y .class [name] show class definition

Z .g prints all objects in the root session

[ .ls ls on current directory

\ .pwd list the current directory, canvas, and style.

] .![shell-command] execute shell command


[expression] evaluates the expression

.files show loaded source files

.class [name] show class definition

.g prints all objects in the root session

.ls ls on current directory

.pwd list the current directory, canvas, and style.

.![shell-command] execute shell commandIntroduction to ROOT, Akiya Miyamoto 26-May-2003

[expression] evaluates the expression

.files show loaded source files

.class [name] show class definition

.g prints all objects in the root session

.ls ls on current directory

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¯ ¯26-May-2003°7±² ³´<µ ³¶ ¶·¸ ¸ ¹ º ¸

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Ð ÑÓÒÔ ÕÖ ×Ø ÙÚ Û Ö Õ Ù Ü Ý Ù Ø Ö × Þ Ò ßà Ù × ÙØ Ö Ü Ò Ø á â Ü Ý�ã ÒÔ Ø Ò á ×ä

å�æ ç æ è æ é êÀë ì å�í îï

é êÀë ì å�í î ð ìæ ñ òó ôõ ö�÷ ø ù úû ü ý þ þ�ÿ � � �� û

�gFile� � � � ��

�gDirectory� � � �� !#" $ % � � &�' ( � )*

+gSystem

, -/. 0 12 3�4 5 6�7 0 1 8�9 32 :;

Introduction to ROOT, Akiya Miyamoto 26-May-2003<=gRandom

>gFile

?gDirectory

@gSystem


gRandom

gFile

gDirectory

gSystem


gRandom

gFile

gDirectory

gSystem


AB26-May-2003CEDF GHJI GK KL

M global ROOT session object

N gROOT->GetListOf< list type >();

O gROOT->LoadMacro();

P gROOT->Time();

Q gROOT->ProcessLine()

Introduction to ROOT, Akiya Miyamoto 26-May-2003R

S global ROOT session object

T gROOT->GetListOf< list type >();

U gROOT->LoadMacro();

V gROOT->Time();

W gROOT->ProcessLine()


global ROOT session object

gROOT->GetListOf< list type >();

gROOT->LoadMacro();

gROOT->Time();

gROOT->ProcessLine()


global ROOT session object

gROOT->GetListOf< list type >();

gROOT->LoadMacro();

gROOT->Time();

gROOT->ProcessLine()


X Y26-May-2003ZE[\ ]^J_ ]` à

b

c d

ef gh ij kl m mn oj prq s tu v wx yz

{| }~ � � ��

� ��

� "small" is the Object Name

� � � �� ¡ ¢ £ £ ¤ ¥

¦�§ ¨ª© « « ¬ ®¯ °§ ± ² ¥³ ´ µ³ ¶�· ¸¹ º»

¼ "smallHisto" is the Variable Name

½ ¾ ¿ ¿À Á Â Ã Ä�Å Æ ¿ ÇÈ ÉÊ Ë ÌÍ ÎÏ Ð Ñ ÑÒ Ó Î ÔrÕ Ö×

Ø�Ù ÚªÛ Ü Ü Ý Þ ßà áÙ â ã× äæå ä ç ç èé ê ê ëì í è îEï ð

ñ FindObject needs the Object Name.

Introduction to ROOT, Akiya Miyamoto 26-May-2003òóô õ

ö "small" is the Object Name

÷ ø ù

ú "smallHisto" is the Variable Name

û ü ý

þ FindObject needs the Object Name.


"small" is the Object Name

"smallHisto" is the Variable Name

FindObject needs the Object Name.


"small" is the Object Name

"smallHisto" is the Variable Name

FindObject needs the Object Name.


ÿ�26-May-2003��

FindObject returns a pointer to TObject. This generates an error:

� � �� ! " "� # � � $ � � % �� &(' � � �� ) #

This is OK:

* + , ,- . / 0 1�2 3 , 45 67 8 9: ;< = > >: ? . / @ > = ; ; A =< 6 9 ?

BC D 0E F 1 ; 8HG I 9 BC D 0E ? * + , , B . / 0 1�2 3 , 45 67 8 9: ;< = > >: ?

F 1 ; 8HG . / J 6 8 K 1�2 @G 2 8 62 8 9L ?

Introduction to ROOT, Akiya Miyamoto 26-May-2003M


N O P PQ R

This is OK:

S T U UV W

V X YZ [

\] ^ _H` W



This is OK:



This is OK:


a b26-May-2003c�de fgih fj jk

l m n no

Due to CINT magic this is also OK:pq rs tvu w x y y q zu {H| } ~� � pq rs

��

�� (� � � �� ( � � � � � ¡¢ £�¤

•

¥¦ §¨ © ª« ¬ ©® ©°¯ ¬²± ³´ ³ µ ¯ ³¶ · ¸ ©®¹ º »¼ ³ ¯ ½¾ ¶ ª · ¬ ¬ ¾¿

•

ÀÂÁ Ã Ä Ã Å Ä ÄÇÆ Ä ÈÊÉ Ë Æ Ì ÌÉ Ë Ä Ë Í Á Ã Ã•

ÎÂÏ ÐÑ Ò ÐÓ Ñ ÔÑ Ï Õ Ñ Ö× ÐØ Ñ × × Ð ÙÚ Ó Û Ñ × ×Ú Ü Ý Ò Þ ÐØ ÜÏ Ï ÐØ Ò

Ø × Ñ Ó Ó

Warning: This will not work in compiled code!

ßàáâãä

Introduction to ROOT, Akiya Miyamoto 26-May-2003å

Due to CINT magic this is also OK:æçèé

•

•

•



Due to CINT magic this is also OK:

•

•

•



Due to CINT magic this is also OK:

•

•

•



ê ë26-May-2003ì�íî ïðiñ ïò òó

ô õ

ö Environment Settings

÷ Command types

ø CINT Commands

ù Global Variables

ú TObject

Introduction to ROOT, Akiya Miyamoto 26-May-2003û







ü ý26-May-2003þ�ÿ� � ��

Named and Un-named Scripts

� Debugging

� ACLiC

Introduction to ROOT, Akiya Miyamoto 26-May-2003 � Named and Un-named Scripts

� Debugging

� ACLiC


Named and Un-named ScriptsDebuggingACLiC




� �26-May-2003��

Un-named Script

� !" # $ %& '& !( )+* ( ) # $ %& ,&

- . .0/ 12 3 1 4 .+5 6 12 5 387 9 : 5 ; .+< 4 1 . 6= < >5

?8@ A B+C D D E+F GH8I HJ H @ I D

K8L MON PQ R S8L P T+U Q V+W XW R S L PY

Z8[ \] ^] _` a` ^b

Named Script

ced d fOg hi j k8l hm

npo qr st u v sw x q v v qy w z{ | } { t } ~e� �

�� 8� � � � � � � �+� �� +� � � � ��

��

� � � � � �+� � � � � � � � � � � � � � ��


Un-named Script

Named Script


Un-named Script

Named Script


Un-named Script

Named Script


� �26-May-2003�� ¡ ¢£�¤ ¢¥ ¥¦§ ¨ © ª

« Un-named Script: hello.C¬® ¯ ° ± ± ²³ ´ µ µ® ² ± ± ´¶ · µ¹¸º

» Named Script:say.C¼ ½ ¾¿ ÀÁ Â ÃÅÄ ÆÁ Ç È É ÆÁ Ê Ë ÌÍ Î Ï Ï ½ ÌÐ

ÑÄ ½Ò Ê Ó Ó É ÆÁ Ê Ó Ó ÎÔ ¿ Ï¹ÕÖ

× Executing the Named ScriptØÙ Ù Ú ÛÜ Ý Þ ß àá â Þ ã

äæå ç çÅÙØÙ Ù Ú Ûè Ý Þ ß àá â Þ ã éê ä ë Ú ìÅå Ø å ê í

ä ë Ú ìÅå Ø å

Introduction to ROOT, Akiya Miyamoto 26-May-2003îï Un-named Script: hello.Cð

ñò Named Script:say.Có ôõ

ö÷ Executing the Named Scriptøù ùúæû

øù ùúü


Un-named Script: hello.C

Named Script:say.C

Executing the Named Script


Un-named Script: hello.C

Named Script:say.C

Executing the Named Script


ý þ26-May-2003ÿ��

� gROOT->Reset()

��

! " #$&% ' () *+ ,% -. -/ % + * ( 0% 1% (% 02 #43 ( . * 5 + (% / 6 -/ 5 - # 1%

5 ) 0 5 ) - ) ) * ' 5 - (% 0Introduction to ROOT, Akiya Miyamoto 26-May-20037

8 gROOT->Reset()

9:


gROOT->Reset()


gROOT->Reset()


;<26-May-2003=�>? @A�B @C CDE F E

G Counting Objects and Memory use

HIKJ L MON P QR R L QS R QT UT LN V P QR R L QS WX YNZ

[K\ \ ]_^ `Ka b c ]ed ]gf h

[K\ \ ]_^ i jk a l ] c ]d ] f h

m Print the Object count and Memory use

n o pq rs t uwv px r4y z {K| }O~ t ��


Counting Objects and Memory use

Print the Object count and Memory use








� �26-May-2003��

� Example output:

�K� ��

¡¢ £ ¤ ¡ £ ¥§¦¨ © ª «¬ ¦ ¤¡ ¤¨ ® ª « ¬ ¦ ¥¦ ¨ © ª «¬ ¦

¯¡ ¤¨ ®�° ±³² ´µ ¶ ± ² ´· ¸ ¹ ² ± ¸ ´ º »½¼ » »¾ ¿À Á ÂÃ ¿

ÄÆÅÈÇ ÉÊ

ËÍÌ ÎÏ Ð�Ñ Ò³Ó Ô ÕÖ Ò Ó Ô× Ø Ò ÔÓ ØÙÚ Û Û Ü½Ý Þ Û ß Û Ûà Ý á â Ü

ã Put ä å æç èé ê ë&ì æí èïî ð ñ&ò ó�ô ê õö

before and after code segment in your script to find memory leaks.

Introduction to ROOT, Akiya Miyamoto 26-May-2003÷

Example output:

Put before and after code segment in your script to find memory leaks.


Example output:



Example output:



ø ù26-May-2003ú�ûü ýþ�ÿ ý� � �

� � � �

� Named and Un-named Scripts

� Debugging

� ACLiC








26-May-2003� � � ��

�Function Objects (TF1)

� � �� ! "� #� " �� ! $ �� % &

' (*) +, - + ./*0 + 1 243 0 5 6 /*7 0 )

8Fitting

9 :;< =>? @AB B A*C D EA B F GH IJ K L J MA*C J L MH C NB A*O C

P QRS S R*T UV W X�Y ZT U[ V ZT \�] ^_ X R*T R*T U ` WT ] S R ^T V

a b*c de fg hij h ke f e lm j n o�p i e q f r j f r g k p fj s

l q f n h ke f

Introduction to ROOT, Akiya Miyamoto 26-May-2003t

Function Objects (TF1)

Fitting



Fitting



Fitting


u v26-May-2003

w x y z{

root/demo/ex0/hist1.C

FloatingFrame



FloatingFrame



FloatingFrame



FloatingFrame


| }26-May-2003

~ � � �

�

FloatingFrame



FloatingFrame



FloatingFrame



FloatingFrame



��26-May-2003

� � �

� � � � �

FloatingFrame



FloatingFrame



FloatingFrame



FloatingFrame



��26-May-2003

� � � � � �

�

�

� � � ��

FloatingFrame

root/demo/ex0/plot2.CIntroduction to ROOT, Akiya Miyamoto 26-May-2003

FloatingFrame

root/demo/ex0/plot2.C


� � � � � �

FloatingFrame

root/demo/ex0/plot2.CIntroduction to ROOT, Akiya Miyamoto 26-May-2003

FloatingFrame

root/demo/ex0/plot2.C


��26-May-2003� �� ¡

¢¤£ ¢ £

1. A C++ like expression using x with a fixed set of operators and functions defined in TFormula

¥¦ §¨ © §«ª ¬® ¥ ¦ § ¯° © §°²± ³µ´ ¶µ· ¸º¹ »¼ ¹ ³½ ¾½ ¿ ¾ ÀÂÁ

Ã ¿ÅÄ Æ ÇÉÈÊ Ë Ì À Á

ÍÎ ¿Ï ÃÐ Ñ ÒÓ Ë Í Î ¿ ÌÔ Ã Ð Ô ½ Ô ÕÖ × Ø Ù²Ú ÛÚ Ü Û ÝÂÞ

Introduction to ROOT, Akiya Miyamoto 26-May-2003ß


àáâã

äå






æç26-May-2003è éê ëì�í ëî îï

ð¤ñ ð ñ ðò

2. Same as the previous TF1 with Parameters

óÂô õ õ÷ö ø�ù úû üý öþ ÿ úö ûþ � �ö ø�� ô þ ô �ù ö ù þ � ü � � úù ý��

� � �� ! "# $ %�& '( ) * + ) + '-,.-/ / 01 23 45 6�7 8 23 97 6: ; / < =3 / > >: 2? >Set the parameters explicitly@A B C D-E F GIH J H KE F E J LM N A M OQP@A B C D-E F GIH J H KE F E J L A N R OQP@A B C S J H T L OQP

Introduction to ROOT, Akiya Miyamoto 26-May-2003U


VW

X

Set the parameters explicitlyYZ [YZ [YZ [



Set the parameters explicitly



Set the parameters explicitly


\]26-May-2003^`_a bced bf fg

hji h i hk

3. Use a defined functionl mon pqor n s put r v w qox r

y�z { |} ~�� { �� z � � y�z { |} ~ � � �� y z { |} ~ � � �� -�� ¡ � ¢ � � £ � � �¤¥ � � ¦-§ § ¨ ¡ © ª « �¬ �� © ® ¯ ª « �¬ �° � � � ±² � � ±�¬ ¢ � ¬ ¯ £ � ��³´ µ¶ · ¸¹ º» ¼¾½ ¿ ¸ ¼¹ ½

ÀÁ Â Ã Ä Â Å ÆÇ È À Á Â ÉÊ Ä ÂÊ Ë Ì�Í Î�Ï ÐÑ Ò Ó Ô ÐÕ Ö Õ × Ö Õ Ø Ù-Ú

Û Ü ÝÞ ß�à Þ á â ãä�å æ ç è éê ë ìèí î ï-ð ñí ñ ëè æè í å ä é ò�ó ôê éõ æä î éeö÷ øúù û û ü ù ýþ ÿþ � ù ûù ÿ�� Introduction to ROOT, Akiya Miyamoto 26-May-2003�

3. Use a defined function� �� !" #

$%&' ()

*+ ,- . /0

1 243 567�8


3. Use a defined function


3. Use a defined function


9:26-May-2003;=<> ?@BA ?C CDEGF F E H I

FloatingFrame

root/demo/ex0/hist4.CIntroduction to ROOT, Akiya Miyamoto 26-May-2003J

FloatingFrame



FloatingFrame

root/demo/ex0/hist4.CIntroduction to ROOT, Akiya Miyamoto 26-May-2003

FloatingFrame



K K26-May-2003

LGM M L N M O M L

P Fitting sub-range h->Fit(“func”,”R”); h->Fit(“func2”,”R+”);

Q Fit using Minuit

R Get fitted results


Fitting sub-range h->Fit(“func”,”R”); h->Fit(“func2”,”R+”);Fit using MinuitGet fitted results






ST26-May-2003U=VW XYBZ X[ [\

] ^ _G` ` _ ` _

aFunctions Objects (TF1)b c dfeg g hi jk lem h li e k ni e co p

q rts uv w u xytz u {| }z ~ � yt� z s

�Fitting� �� t� � �� f� � �� t� �

� �� t� �� ¡f¢ £� �¤ � £� ¥f¦ §¨ ¡ � � � � � © � ¦ � � §� �

ª «t¬ ® ¯° ±²³ ± ´® ¯ ® µ¶ ³ · ¸f¹ ² ® º ¯ » ³ ¯ » ° ´ ¹ ¯³ ¼

µ º ¯ · ± ´® ¯Introduction to ROOT, Akiya Miyamoto 26-May-2003½

Functions Objects (TF1)

Fitting



Fitting



Fitting


¾¿26-May-2003

À À Á Â Ã

Ä Create tree and branch: ÅÆ Æ Ç ÈÉËÊ Ì Æ È Ç ÅÊ Ê È ÌÍ ÎÊ Ï Ç ÅÊ ÊÑÐ Ò

Ó Read Tree:

Ô By Draw method: ÕÖ Ö × ØÙËÚ Û Ö Ø × ÕÚ Ú Ø ÕÚÜ ÙÞÝ × ÕÚ ÚÑß à t->Draw(variable, critera, option, nentries, 1st_entry)á Draw variables: 1D, 2D, OverWriteâ Put cutsã Limit number of eventsä Extract histogram

å Event loop by yourself


æ Create tree and branch:

ç Read Tree: By Draw method: t->Draw(variable, critera, option, nentries, 1st_entry)

Draw variables: 1D, 2D, OverWritePut cutsLimit number of eventsExtract histogram

Event loop by yourself


Create tree and branch: Read Tree:

By Draw method: t->Draw(variable, critera, option, nentries, 1st_entry)




Create tree and branch: Read Tree:

By Draw method: t->Draw(variable, critera, option, nentries, 1st_entry)




èé26-May-2003

ê ë ë ì í ì ê ê

î

Use THtml classï Anything between begin_html and end_html is raw html commandð Link to class name is created automatically.ñ

THtml html;html.MakeClass( class_name );html.Convert( script_file, title, out_dir );


ò

Use THtml classó Anything between begin_html and end_html is raw html commandô Link to class name is created automatically.õ



Use THtml class Anything between begin_html and end_html is

raw html command Link to class name is created automatically.



Use THtml class Anything between begin_html and end_html is

raw html command Link to class name is created automatically.



ö ÷26-May-2003

ø ù ú ú

û TMath::xxxx

ü TRandom/TRandom2/TRandom3

ý TMatrix

þ TLorentzVector/TLorentzRotation

ÿ TLatex� TMinuit� TGxxxxx : graphic� TPythia6


� TMath::xxxx � TRandom/TRandom2/TRandom3� TMatrix� TLorentzVector/TLorentzRotation� TLatex� TMinuit TGxxxxx : graphic TPythia6


TMath::xxxx TRandom/TRandom2/TRandom3TMatrixTLorentzVector/TLorentzRotationTLatexTMinuitTGxxxxx : graphicTPythia6


TMath::xxxx TRandom/TRandom2/TRandom3TMatrixTLorentzVector/TLorentzRotationTLatexTMinuitTGxxxxx : graphicTPythia6


� �26-May-2003

TObjArray,TClonesArray,TIter

TObjArray � �� ! � � �#" � �$ � � � � �

% & ' '& ' '( ) *+ ,

- .0/ 1 234 56 78 90: ; < / ; =/ 2 3 4 56 78 >? 4 / @

A TClonesArrayB C�D E FG H EI JK L G M M ND J M G OI K L G M MQP N H R I SUT M H V I D WX I K F

Y Z [ [\] ^ _a` bac \ ] de fg h i jk ] ` l

root/array/tobjarray.C, tclonesarray.CIntroduction to ROOT, Akiya Miyamoto 26-May-2003

TObjArray,TClonesArray,TIterm TObjArray

n TClonesArray

root/array/tobjarray.C, tclonesarray.C


TObjArray,TClonesArray,TIterTObjArray

TClonesArray

root/array/tobjarray.C, tclonesarray.CIntroduction to ROOT, Akiya Miyamoto 26-May-2003

TObjArray,TClonesArray,TIterTObjArray

TClonesArray

root/array/tobjarray.C, tclonesarray.C


o p26-May-2003

q q r

s Building Root Treest Reading Root Treesu Using Trees in Analysis v w xzy {}| ~� �y � xz� �

� � �z� � �� z� �

� Add your class to ROOT� �� z� �}� � � ��

� �� z ¡¢ £¤ � ¥z¦ § ¨© � §¦ ª« � ¬ § § ®

¯ °�± ² ³´ ° ³Introduction to ROOT, Akiya Miyamoto 26-May-2003

µ Building Root Trees¶ Reading Root Trees· Using Trees in Analysis

¸ Add your class to ROOT


Building Root TreesReading Root TreesUsing Trees in Analysis

Add your class to ROOT


Building Root TreesReading Root TreesUsing Trees in Analysis

Add your class to ROOT


¹ º26-May-2003

» ¼ ¼ ½ ¼ ¼Step 1:

define your class as a descendent of TObject and write the implementation.

SClass.h¾ ¿ ÀÁ Â�Ã Ä Å Æ ¿ ÇÈ ÉÊ ÅË ÌÎÍ ÏÑÐ¾ ¿ ÀÁ Â�Ã Ä Å ÒÓ Ô ÕÖ ÅÁ É Í Ï Ò

Á ÂË È È ×Ø ÂË È È Ù ÚÃ Õ Â ¿Á Ó Ô ÕÖ ÅÁ É Û

Ü


Step 1:define your class as a descendent of TObject and write the implementation.

SClass.hÝ Þ ßà áÝ Þ ßà áà á âã ã

ä



SClass.h



SClass.h


åæ26-May-2003

ç è è é è èStep 2:

ClassDef(ClassName,ClassVersionID)

At the end of the class definitionClassImp(ClassName)

At the beginning of the implementation file


Step 2:ClassDef(ClassName,ClassVersionID)












êë26-May-2003

ì ì í îClassDef and ClassImp needed for Object I/O :These macros can automatically create:• Streamer method needed for writing to ROOT files

and Trees.

• ShowMembers()

• >> operator overload


ClassDef and ClassImp needed for Object I/O :These macros can automatically create:• Streamer method needed for writing to ROOT files

and Trees.

• ShowMembers()




and Trees.

• ShowMembers()




and Trees.

• ShowMembers()



ï ð26-May-2003

ñ ñ ò

Step 3:create a LinkDef.h fileó ô õö ÷ õ ø ø ùú ûü ø øó0ý þ ÿ� � ÿ � ô�� õ õ ÿ � � � � � � ÿ �� ó0ý þ ÿ� � ÿ � ô�� õ õ ÿ � � � � ÿ� � ÷� ó0ý þ ÿ� � ÿ � ô�� õ õ ÿ � � õ � � � � ô ��

��

!�" # $% &


Step 3:create a LinkDef.h file' (

'�)'�)

'�)*�+

,�-


Step 3:create a LinkDef.h file


Step 3:create a LinkDef.h file


. .26-May-2003

/ 0 1 2

3"-" do not generate a streamer.4 5�6 78 9: 8 ;< = > ?�@ @ A ;�8 B B C ? ;�8 B BED F

G HJI K LNM O M PQ KR S I T U S V R WI S M X UZY K [ I S O K \ X K O I

]"!" do not generate the operator >>^ _�` ab cd b ef g h i�j j k e�b l l m i e�b l lEn oEp

q rJs t uNv w x yz s s t s {v | } { ~ t w } | } { � u w v �� t x |��"+" use the byte count check� ��

� � � �� ¡ ¢�£ ¤¦¥ ¤ ¡¨§ ©� ª «� ¡ ¢�£ � £ ¬ � � �� ®


¯"-" do not generate a streamer.° ±²³

´"!" do not generate the operator >>µ ¶·¸¹

º"+" use the byte count check» ¼½¾¿


"-" do not generate a streamer.

"!" do not generate the operator >>

"+" use the byte count check


"-" do not generate a streamer.

"!" do not generate the operator >>

"+" use the byte count check


À Á26-May-2003

Â Ã Ä Å Â Å

Step 4:

Æ Ç¨È É Ê Ê Ë É Ì Ç Í É ÊÎ Ï Ð Ê Í Í ÆÑ Ñ È Ð Ç Î È È Ñ Ê Ï Ï Ò Ñ Ó Æ

Ð Í ÊÔ Ô È Ñ È Õ É Ï Ç ÐÈ Ç Ñ Î Ê Æ ÒÖ

×Ø ÙÛÚ Ü Ü Ý Þàß áãâ ß ä ä ×Ø ÙÛÚ Ü Üâ å æ Þàç è Ýêé ëâ å

ìí î ï ïð ×ñ × ò ó Þàç ôõ õ öø÷ ùàú ö û ü

ýþ ÿ�� û � ýþ ÿ�� ü� �


Step 4:

��


Step 4:


Step 4:


� �26-May-2003

� � � � �

�LinkDef.h must be the last argument on the rootcint command line. �The LinkDef file name MUST contain the string:� !�" #$�% &' (�)* + ! " #,% & ' (- ! '% ' . / 01 ! " # $% & ' ( !�2&!�" % 354 2 6 + ! #% - 78 + !�" # ,% & ' ( '9


LinkDef.h must be the last argument on the rootcint command line.

The LinkDef file name MUST contain the string:








:;26-May-2003

< =

Compile the class using the Makefile>? @ ACB D EF @ ACB EGH BJI K > G ACL L

Load the shared libraryMN N O PQ RTS U VW X5YZ Z S Z NMN N O P[ R VW X5YZ Z \Z ]_^ àb VW X5YZ Z cdMN N O Pe Rf g h X a \ i^ àb f g h X a cjk i h X aS MN N OjTljm nok f pj drqMN N O Ps R Z ]ut v w M h O a cdrqIntroduction to ROOT, Akiya Miyamoto 26-May-2003

Compile the class using the Makefilexy z

Load the shared library{| {|{|}~�{|


Compile the class using the Makefile

Load the shared library


Compile the class using the Makefile

Load the shared library


��26-May-2003

More information on ROOT

� ROOT home page http://root.cern.ch/�

Root class categories �� ¡�¢£ ¤¥ ¥�¦§ ¨ ¨�©ª ª ¥�« ¬¢ © « ¬ ¤ ¨ ©ª ª ¥ ¨ ¤¥� � ®¯° ¨ �� ¡ ¢ £ « ¤ ¥ �± ²�³ ³ ´ µ ³¶ ´³ · ´ ´�¸¹ º º�» ³ ³ ´�¼ ½¾ »¿ ¼ ½ · º» ³ ³ ´ º µ ³ ¶ ´�³ ¼ · ´�À Á

Â ÃÄ Å ÅÆ ÇÈ ÇÉÊÌË Ê�ÍÎ Ï�Ð Ñ

To run demo programs, do ÒÔÓÕ Õ Ö ×�ØÙ ÕÚ Û ÜIntroduction to ROOT, Akiya Miyamoto 26-May-2003

More information on ROOTÝ ROOT home page http://root.cern.ch/Þ

Root class categories ßàáâã

To run demo programs, do


More information on ROOTROOT home page http://root.cern.ch/

Root class categories



More information on ROOTROOT home page http://root.cern.ch/

Root class categories


Documents

Akiya Miyamoto, KEK Bases on ROOT lecture by Suzanne