ROOT COMMANDS

In the previous sections we've made use of the mouse and clicked our way through ROOT. You must be curious by now, how these things are done on the root command line. In this section we show you how to do the things we did with the mouse, from the command line with root commands.

Root commands come in three flavors, C++ commands, CINT commands, and Shell commands. Here are examples of all three:

 

1)     C++ syntax:
  root[0] TBrowser * b = new TBrowser();

 

2)     CINT commands start with a “.”

 root [1].?

 // this command will list all the CINT commands

 root [2].X [filename]

 // load [filename] and execute function [filename]

 root [3].L [filename]

 // load [filename]

 

3)     SHELL commands start with a “.!”
 root[4] .! ls

This command will list the contents of the current shell directory

C++ commands are combined to build macros, the scripts that you will later be writing in order to create, modify and display your final output.  The commands are case sensitive, so make sure you've entered them properly.

The Tab-Tab Feature

When you enter commands, ROOT provides a very helpful tab-tab feature.  You type in a variable followed by an arrow, for example:

  gStyle->           and then enter a tab

This prints out on your display a listing of all the methods and members of gStyle.

This lists all of the things that you can do with gStyle at this point.

Now you can continue by typing in:

            gStyle-> SetOpt<tab>

It will display a list of all the methods and members that start with SetOpt.

Now type:

            gStyle-> SetOptS<tab>

It completes the line to say: gStyle-> SetOptStat. Type

gStyle-> SetOptStat( <tab>

A list of the parameters that are expected for this method will appear.  If the method has multiple signatures all of them are displayed.

The Command HistoryFile

A history of the commands that you entered during ROOT sessions is stored in text file called $ROOTSYS/.root_hist.  Commands can be copied out of this text file and placed into the text file that you create as the script (the series of running commands) of your macro.

Open a Root File and Display the Browser

Before we start I would like to explain a couple of things about the syntax used on the root command line that always puzzles people. First, you have the option to leave off the semicolon (;) at the end of a root command when working on the command line. The difference between having it and leaving it off is that when you leave it off the return value of the command will be printed on the next line. For example:

root [0] 23+5  // no semicolon prints the return value

(int)28

root [1] 23+5; // semicolon no return value is printed

root [2]


The second leniency of CINT is that is allows you to use "." and "->" interchangeably. If you have learned C++, this will bother you and look strange. A pointer p still works when used as p.Print() rather than p->Print(). This is a well-meaning feature of CINT that takes getting used to, especially for the C++ expert.

 

ROOT Command

What does this command do?

.q

End a ROOT session

TFile *my = new TFile("htt_175a.root");

Open a file

TBrowser *b = new TBrowser();

Open the ROOT Object Browser

my->ls();

List contents of a file called "my"

my->cd("TOPPLOT");

 

gDirectory->ls();

Change directory to make TOPPLOT the current directory (the directory which contains the ntuples)

List contents of current directory, now  TOPPLOT

h21->Print();

To find names of variables in the ntuple file

Drawing Histograms

ROOT Command

What does this command do?

h21->Draw("L1_pz");

To display the variable "L1_pz" as a 1-D histogram

c1->Print();

To print the display of canvas "c1".   ROOT saves it as a ps file to print later.

h21->Draw("L1_pz>>myh1");

To display the variable "L1_pz" and save to a named histogram called "myh1"

 

Adding Text

Here are some examples of commands for adding text to your display, setting the fill colors of objects, and the color and style of markers that are used for drawing a histogram with error bars. To see a menu of colors available to use in ROOT with the numbers assigned to them, you go to the "Colors" option under canvas item menu "View".  For marker styles, you go to "Markers", also under canvas item menu "View".

ROOT Command

What does this command do?

t1 = new TpaveLabel(-235,1217,-44,1387,

       "A label","br");

t1->SetFillColor(6);

myh1->Draw();

t1->Draw();

Create a pave label

 

Set a fill color for it

Display  canvas "myh1"

Display the label on the canvas

myh1->SetFillColor(2);

myh1->Draw();

Set  the fill color of "myh1" to red and

display

h21->SetMarkerColor(4);

h21->SetMarkerStyle(8);

h21->Draw("L1_py","","e1");

 

Set  marker color of "h21" to blue

Set  marker style of "h21" to a filled circle

Draw "L1_py" with error bars

(Other displays are "e2", "e3", and "e4")

Axis Title

ROOT Command

What does this command do?

myh1->GetXaxis()->SetTitle("X-Axis");

Give the x-axis the name "X-Axis"

myh1->GetXaxis()->CenterTitle(1);

Center the name of the x-axis.

myh1->GetYaxis()->SetTitle("Y-Axis");

Give the y-axis the name "Y-Axis"

myh1->GetYaxis()->CenterTitle(1);

Center the name of the y-axis.

 

Adding Cuts

ROOT Command

What does this command do?

h21->Draw("L1_px","(L1_px>0) ");

Display "L1_px" where "L1_px" is greater than zero

h21->Draw("L1_py","(L1_px<0) ");

Display "L1_py" where "L1_px" is less than zero

h21->Draw("L1_px","(L1_py<.5) && (L1_pz>10)");

Chained cuts

 

Changing Statistics

ROOT Command

What does this command do?

gStyle->SetOptStat(111111);

Set statistics to display under and overflow

 

Fits and Functions

ROOT Command

What does this command do?

myh1->Fit("gaus");

Fit the saved histogram " myh1" with a gaussian fit.

myh1->Fit("pol9");

Fit the histogram " myh1" with a polynomial fit of degree N, in this example pol9.

f1= new TF1("f1","abs(sin(x)/x)",0,10);

f1->Draw();

Create a user-designed function and draw it

TF1 *e1 = new TF1("e1","expo",0,200);

myh1->Fit("e1","R");

 

 

 

 

e1->SetRange(0,200);

 

myh1->Fit("e1","R");

Declare a exponential function to fit over a sub range

 (Note:  the "R" in the Fit command stands for "range".  If you leave out the  "R" as an argument in the Fit command, the range of fit is the current range of the histogram(in this case, the full range)    To reset the range to what you want, you would have to use the SetRange command:

If "R" previously left out, to reset the range of fit "e1" from 0 to 200

Then enter the fit command again, using "R'" option)

TF1 *g1 = new TF1("g1","gaus",-200.,200);

TF1 *g2 = new TF1("g2","gaus",-200., 0);

myh1->Fit("g1","R");

myh1->Fit("g2","R+");

Display 2 subranges of fits on one display using built in function gaussian function

 

f2 = new TF1("f2","[0]/(x*x+[1]*[1])" ,-100,100);

f2->SetParameters(1000000,30);

myh1->Fit("f2","R");

Create a user designed function to use in a fit

Set initial values of parameter

Fit the function to histogram "myh1"

 

Multi-histogram display

ROOT Command

What does this command do?

myc1= new TCanvas("myc1","My canvas");

Manually create a new canvas

myc1->Divide(2,2);

 

myc1_1->cd();

h21->Draw("L1_px>>his1");

 

myc1_2->cd();

his1->DrawCopy("lego1");

 

myc1_3->cd();

his1->Fit("gaus");

myc1_4->cd();

myc1_4->SetLogy(1);

his1->Draw();

 

Automatically generate 4 pads in the new canvas  "myc1" and then set the display for each pad

Set  pad1 "myc1_1" as active pad and display standard histogram view of "L1_px",  saving the display as a named histogram "his1"

Set pad2 active, and draw a copy of "his1" as lego view

 

Set pad3 active , and draw a copy of "his1" with a  gaussian fit

 

Set pad4 active and set to display a logarithmic histogram.  Display "L1_px" in it.

 

 

 

Global Variables

ROOT Command

What does this command do?

gEnv->Print();

Display the settings of the current ROOT environment

gObjectTable->Print();

Display list of objects known in current ROOT session

gStyle->SetOptStat(111111);

Set statistics to full display

 

Two Dimensional Display

Here, let's just start afresh.  We'll quit ROOT and start a new session where we will open our example root file and again change the directory to TOPPLOT in order to work with 2 variables. ROOT keeps a history of the commands you have entered in a file that is called root_history.txt and you can recall previous commands by using the arrow keys on your keyboard

ROOT Command

What does this command do?

TFile *my = new TFile("htt_175a.root");

my->cd("TOPPLOT");

h21->Draw("L1_px");

h21->Draw("L1_py", ,"same");

 

 

 

 

To also display "L1_py" on the current display that shows L1_px

h21->Draw("L1_px:L1_py");

Display L1_px and L1_py as a scatter plot

h21->Draw("L1_px:L1_py", ,"lego");

Draw as a lego plot

h21->Draw("L1_px:L1_py", "L1_pz<50");

Draw with a cut

h21->Draw("L1_px:L1_py", "L1_pz<50","cont");

 

Draw with cut as a contour plot

 

Creating a Root File

Although we haven't covered this in the tutorial, here is an example of commands to create a Root file.  Files can contain any kind of ROOT objects, such as histograms or canvases. When you create a histogram or root tree, ROOT will automatically attach it to the ROOT file. Other objects, such as a new canvas that you create and want to put it into a saved ROOT file, have to be explicitly attached to the file.

 

The choices for the second parameter on the TFile constructor are: RECREATE, NEW, CREATE, READ, and UPDATE. The NEW and CREATE have the same effect. They will create a new file and open it for writing, but if the file already exists it is not opened. RECREATE will also create a new file and if the file already exists it will be overwritten. UPDATE will open an existing file for writing. READ will open an existing file as read only.

 

In the box below are commands to create a new ROOT file, and then create and save a new histogram and a new canvas in the ROOT file that you have created.

 

ROOT Interactive Command

What does this command do?

gROOT->Reset();

TCanvas *mc1 = new TCanvas("mc1","My canvas");

TFile *hfile = new TFile("newfile.root","RECREATE");

 

TH1F *hr    = new TH1F("hr"," Random",20,0,10); 

gRandom->SetSeed();

  {

        for ( Int_t i=0; i<500; i++) {

            Float_t random = gRandom->Rndm(1)*10;   

            hr->Fill(random);        

       }

  }

 

hr->Draw();

mc1->Modified();

mc1->Update();

hfile->Append(mc1);

 

 

 

hfile->Write();

 

Clear ROOT

Create a new canvas

Create a new .root file that we name as "newfile.root"

Create a new histogram "hr" and fill the histogram with random numbers

 To start a multi line command from the command line, you type an opening curly bracket.
The prompt changes and you can type
the next line of the multi-line command.
The prompt stays in the multi-line mode until you enter a matching closing curly bracket. At that time, the prompt returns to the single line mode.

 

 

Draw the histogram "hr"

Update the canvas "mc1"

 

Explicitly attach the canvas to the file

(If the object is a histogram or a ntuple/tree, ROOT automatically attaches it to the file)

 

 Save the file

 

TDirectory *d = hfile->mkdir("MyTop");

 

TCanvas *mc2= new TCanvas("mc2","My canvas");

f1= new TF1("f1","abs(sin(x)/x)",0,10);

f1->Draw();

 

d->Append(mc2);

gDirectory->Append(mc2);

hfile->Write();

hfile->Close();

 

Create a subdirectory of your ROOT file with a pointer named "d"

 

Make a canvas and fill with a display

 

 

Add the canvas to the subdirectory

Another way to add canvas to subdirectory

Save file

Close file

 

 

 

Helpful Hints

Converting a PAW ntuple file into a ROOT file

At this point, you might want to try out ROOT using a ntuple file of your own.  There is a program called h2root which converts files created with PAW into ".root" files that can be used with ROOT.  To do the conversion, at the system prompt, you just have to type:                    

h2root   filename.hbook  filename.root

If your file contained a HBOOK ntuple, it is automatically converted into a ROOT tree. In ROOT terms, it becomes an object of the TTree class.  If your file had a HBOOK histogram, it is automatically converted into a histogram object of ROOT's TH1F class.

Once your file is converted you can start using it with ROOT.

Reading an ASCII file and making a ROOT ntuple

ROOT's official homepage from CERN contains a Tutorial file, and one of the tutorials is an example of a macro that reads data from an ASCII file and creates a root file with a histogram and a ntuple.  This tutorial is located at:

 

                                    http://root.cern.ch/root/html/examples/basic.C.html

 

You can modify this macro and use it for your own ASCII files.

Saving the ROOT Canvas as a Macro

In the above examples of ROOT commands there is an example for putting a pave label into a histogram display.  The easiest way to do this is to use the graphic interface, just as we did in Part 1. You can set up a Pave Label using the Editor that is located under the canvas menu item Edit .  Once you have the display set up in a way you like, you can use the option Save as canvas.C , located under the canvas menu item File.  This creates a skeletal macro with the default name of the canvas you have on display followed by ".C" (e.g. c1.C). The skeletal macro would have the ROOT command coding for the pave label with its position on the canvas.   The macro will require some editing, but can be a useful basis for a macro that you would create for your own use. Additionally, a history of the commands that you entered during ROOT sessions is stored in text file called root_history.txt.  Commands can be copied out of this text file and placed into the text file that you create as the script (the series of running commands) of your macro.

 

Further Documentation About ROOT

We hope this tutorial has given you a small introduction to ROOT and that you will now be interested in going out into the wide world of ROOT to learn and make use of its more advanced functionality when using it as a physics analysis tool.  There is a wealth of material about ROOT available via the web, particularly through the homepage of ROOT where the creators of ROOT, Rene Brun ,Fons Rademakers and their team, have provided an enormous amount of documentation .

 

The ROOT Homepage is the official ROOT web site.   The location is: http://root.cern.ch.  Some very useful locations within this site to the beginner user are given below.  All of them can be accessed from the listing that appears on the Homepage.

 

Search the ROOT Web Site.  For on-line help or a search on a particular topic it's very useful to use this facility.   The location is: http://root.cern.ch/root/Search.phtml

 

The ROOT Tutorials are a description of tools that you will be using in ROOT for a PAW style analysis.  It gives examples of creating histograms/ntuples, fits, functions,etc. with sample macros. .   The location is: http://root.cern.ch/root/Tutorials.html

 

The ROOT How To's are an introduction to the infrastructure of ROOT and give examples of how to write code within ROOT classes. .   The location is: http://root.cern.ch/root/Howto.html

 

Classes and Members Reference Guide is an index to ROOT classes with full class description, including  options to commands using the class. The location is http://root.cern.ch/root/html/ClassIndex.html

 

The Publication List is a list of ROOT related publications. At the bottom of the list is non official ROOT documentation. It is located at: http://root.cern.ch/root/Publications.html

 

There is a ROOT talk mailing list.  Subscribe via:

http://root.cern.ch/cgi-bin/registration.pl

 

To submit a bug report:  http://pcroot.cern.ch/root-bugs. 

You can search and browse the Bug Database before submitting your own bug report.

 

Setting up Root at Femilab

1. Log on to cdfsga, fnalu, fnpat1, or d02ka

2. On cdfsga type:

setup root v2_23_11 –q KCC_3_3
You may need to set up your environment. At the system prompt type:

source ~cdfsoft/.cshrc

On fcdfsgi2, root should be already setup

On fnalu type:

setup root v2_23_11

On d02ka type:

setup root v2_23_11 -q KCC_3_3:exception

On fnpat1 type:

setup root v2_23_11 -q KCC_3_3

3. Startup root by typing at the system prompt:

            root

4. Quit root by typing .q at the root prompt

      root[0] .q

Revision History

June 15, 1999

0.1

Suzanne Panacek

First revision for UNIX and Root Class

June 15, 1999

0.2

Suzanne Panacek

Converted to .doc file for better formatting.Changed wording from folder to tree. Added rotating the lego plot.

June 16,1999

0.3

Elaine Lyons

Changed wording on introductory page to make the structure of the document clearer.

p2. Bottom- Removed word "always" from " a good idea"

p3 e-4  changed "look like this"->"as shown"  e-2 "histogram drawing of the.." to " display a 1-D histogram of the.."

p6 last sentence  changed"displaying the fit" to "performing the fit"

p9 e-1 "size of button" to " size of pad"

p10  2. "enter options as follows" to "enter options as shown"

p12.  Last paragraph: added ascii file

p13. Added text to Root Tutorial pointer. Changed cdf to Fermi Systems

June 16, 1999

0.4

S. Panacek

Updated links to sample file and cursor types.

June 17, 1999

0.5

E. Lyons

Added Part 1 to First session heading and minor wording changes to text

June 17, 1999

0.6

Elaine Lyons

Added section for using ROOT's Class and Members Reference

June 18,1999

0.6

E.Lyons

Text changes and added pointer to How to use graphics Editor

June 23, 1999

06

S.Panacek

Add the images as part of the document

 

 

Appendix A: ROOT Command Reference

 

Axis: give the axis a title

myh1->GetXaxis()->SetTitle("X-Axis");

Axis: center the title

  myh1->GetXaxis()->CenterTitle(1);

Browser: create a ROOT Browser

TBrowser *b = new TBrowser();

Canvas: manually create a canvas

myc1=new TCanvas("myc1","My canvas");

Canvas: automatically generate 4 pads

myc1->Divide(2,2);

Canvas: set pad1 "myc1_1" as active pad

myc1_1->cd();

Canvas: print the display of a canvas

c1->Print();

Canvas: refresh canvas "mc1" on screen

mc1->Update();

Cuts: examples

h21->Draw("L1_py","(L1_px<0) ");

h21->Draw("L1_px","(L1_py<.5) && (L1_pz>10)");

Directory: list contents of current directory

gDirectory->ls();

Directory:  change directory

my->cd("TOPPLOT");

Directory: create a subdirectory

TDirectory *d = hfile->mkdir("MyTop");

Directory: add canvas "mc2" to subdir

Directory: add object  to current directory

d->Append(mc2);

gDirectory->Append(mc2);

End a ROOT session

.q

File: Open a file

TFile *my = new TFile("htt_175a.root");

Files:  create new .root file

TFile *hfile = new TFile("newfile.root","RECREATE");

Files:  save file

hfile->Write();

Files: close file

hfile->Close();

File: list contents of a file

my->ls();

Files: attach object to a file

hfile->Append(mc1);

Fits: fit histogram "his1" with a gaussian fit

his1->Fit("gaus");

Fits: fit histogram with a polynomial  fit

his1->Fit("pol9");

Functions:  create user designed function

f1= new TF1("f1","abs(sin(x)/x)",0,10);

Functions: exponential function to fit over a

                  subrange

TF1 *e1 = new TF1("e1","expo",0,200);

myh1->Fit("e1","R");

Function : set initial values of a parameter

f2->SetParameters(1000000,30);

Global variables: current environment

gEnv->Print();

Global var:  list of objects in current session

gObjectTable->Print();

Global variable:  clearing ROOT

gROOT->Reset();

Histogram: draw histogram "his1"

his1->Draw();

Histogram: draw a copy as lego view

his1->DrawCopy("lego1");

Histogram : Draw with error bars

h21->Draw("L1_py","","e1");

Histogram: set a fill color

t1->SetFillColor(6);

Histogram:  set marker color

h21->SetMarkerColor(2);

Histogram:  set marker style

h21->SetMarkerStyle(8);

Histogram: set to log. scale

myc1_4->SetLogy(1);

Histogram: save display as a named hist.

h21->Draw("L1_px>>his1");

Histogram: create & fill with random nos.

TH1F *hr    = new TH1F("hr"," Random",20,0,10); 

gRandom->SetSeed();

  {

        for ( Int_t i=0; i<500; i++) {

            Float_t random = gRandom->Rndm(1)*10;   

            hr->Fill(random);        

       }

  }

Pave label: Create a pave label

t1 = new TPaveLabel(-235,1217,-44,1387,

       "A label","br");

Range:  set range of a fit

e1->SetRange(0,200);

Range:  fit  with range option

myh1->Fit("e1","R");

Range: set 2 subranges of fits on

            one display

TF1 *g1 = new TF1("g1","gaus",-200.,200);

TF1 *g2 = new TF1("g2","gaus",-200., 0);

myh1->Fit("g1","R");

myh1->Fit("g2","R+");

Scatter plot: display "L1_px" and "L1_py"

h21->Draw("L1_px:L1_py");

Statistics: set to display under and overflow

gStyle->SetOptStat(111111);

Tree:  create a TTree Viewer

h21->StartViewer();

Tree: display as a 1-D histogram

h21->Draw("L1_pz");

Tree: display & save as named histogram

h21->Draw("L1_pz>>myh1");

Tree: find names of variables in file

h21->Print();

Tree: " py" on same display as " px"

h21->Draw("py", ,"same");

Tree: 2 -D histogram as a scatter plot

h21->Draw("L1_px:L1_py");

Tree: 2-D scatter plot histogram  with a cut

h21->Draw("L1_px:L1_py", "L1_pz<50");

Tree: 2-D contour histogram with cut

h21->Draw("L1_px:L1_py", "L1_pz<50","cont");

Tree: 2-D as a lego plot

h21->Draw("L1_px:L1_py", ,"lego");

 

 

0.1

Suzanne Panacek

First revision for UNIX and Root Class

June 15, 1999

0.2

Suzanne Panacek

Converted to .doc file for better formatting.Changed wording from folder to tree. Added rotating the lego plot.

June 16,1999

0.3

Elaine Lyons

Changed wording on introductory page to make the structure of the document clearer.

p2. Bottom- Removed word "always" from " a good idea"

p3 e-4  changed "look like this"->"as shown"  e-2 "histogram drawing of the.." to " display a 1-D histogram of the.."

p6 last sentence  changed"displaying the fit" to "performing the fit"

p9 e-1 "size of button" to " size of pad"

p10  2. "enter options as follows" to "enter options as shown"

p12.  Last paragraph: added ascii file

p13. Added text to Root Tutorial pointer. Changed cdf to Fermi Systems

June 16, 1999

0.4

S. Panacek

Updated links to sample file and cursor types.

June 17, 1999

0.5

E. Lyons

Added Part 1 to First session heading and minor wording changes to text

June 17, 1999

0.6

Elaine Lyons

Added section for using ROOT's Class and Members Reference

June 18,1999

0.6

E.Lyons

Text changes and added pointer to How to use graphics Editor

June 23, 1999

06

S.Panacek

Add the images as part of the document

Appendix B: The Canvas Menus

 

The ROOT canvas has a drop down menu which includes:  File, Edit, View, Options, Inspect and Classes.  There are also Context Menus for options

File : Most of the options for this canvas menu item are fairly self evident, but we'd particularly like to call attention to some of the Save as options

 

Option

What does it do?

Save as canvas.C

Generates a macro automatically which contain the ROOT command statements that correspond to the picture that you created interactively in canvas "c1"

 

Save as canvas.gif

Saves the canvas display as a .gif file

Save as canvas.ps

Saves the canvas display as a postscript file

Save as canvas.eps

Saves as an encapsulated postscript file

 

Edit : has options to Clear Pad and Clear Canvas.  Also has option Editor

           

Option

What does it do?

Editor

Brings up the built-in graphics editor window which you can use to draw and edit basic primitives (arcs, arrows, text, paves, etc)

starting from an empty canvas or as an addition to your current display

A good description of how to use the editor is located at: http://root.cern.ch/root/HowtoEdit.html

 

View :  Includes among the options:

 

Option

What does it do?

Colors

Brings up a separate window display of the colors available to use in ROOT with the numbers assigned to them

Markers

Brings up a separate window display of the marker types available to use in ROOT with the numbers assigned to them

 

 

Options :  Includes among the options: Show Statistics, Show Histogram Title,  and Show Fit Parameters which set the respective items to either be displayed or not displayed on the canvas.  Other useful options, which we made use of in Part 1, include:

 

           

Option

What does it do?

Event Status

Displays the Event Status bar at the bottom of the canvas display window.  Gives information about coordinate points on the canvas

Refresh

Refreshes the canvas display

           

 

Inspect :  has 2 options

           

Option

What does it do?

ROOT

Brings up the Inspect window which gives information about all TROOT members being used in the current ROOT session

Start Browser

Brings up a new ROOT Browser window. Can be used by clicking  to display and modify attributes of objects that are part of the current ROOT session.

 

Classes :  has an option for Class Tree.  It is more applicable for non-novice users of ROOT.

 

 

 

0.1

Suzanne Panacek

First revision for UNIX and Root Class

June 15, 1999

0.2

Suzanne Panacek

Converted to .doc file for better formatting.Changed wording from folder to tree. Added rotating the lego plot.

June 16,1999

0.3

Elaine Lyons

Changed wording on introductory page to make the structure of the document clearer.

p2. Bottom- Removed word "always" from " a good idea"

p3 e-4  changed "look like this"->"as shown"  e-2 "histogram drawing of the.." to " display a 1-D histogram of the.."

p6 last sentence  changed"displaying the fit" to "performing the fit"

p9 e-1 "size of button" to " size of pad"

p10  2. "enter options as follows" to "enter options as shown"

p12.  Last paragraph: added ascii file

p13. Added text to Root Tutorial pointer. Changed cdf to Fermi Systems

June 16, 1999

0.4

S. Panacek

Updated links to sample file and cursor types.

June 17, 1999

0.5

E. Lyons

Added Part 1 to First session heading and minor wording changes to text

June 17, 1999

0.6

Elaine Lyons

Added section for using ROOT's Class and Members Reference

June 18,1999

0.6

E.Lyons

Text changes and added pointer to How to use graphics Editor

June 23, 1999

06

S.Panacek

Add the images as part of the document

 

 

June 15, 1999

0.1

Suzanne Panacek

First revision for UNIX and Root Class

June 15, 1999

0.2

Suzanne Panacek

Converted to .doc file for better formatting.Changed wording from folder to tree. Added rotating the lego plot.

June 16,1999

0.3

Elaine Lyons

Changed wording on introductory page to make the structure of the document clearer.

p2. Bottom- Removed word "always" from " a good idea"

p3 e-4  changed "look like this"->"as shown"  e-2 "histogram drawing of the.." to " display a 1-D histogram of the.."

p6 last sentence  changed"displaying the fit" to "performing the fit"

p9 e-1 "size of button" to " size of pad"

p10  2. "enter options as follows" to "enter options as shown"

p12.  Last paragraph: added ascii file

p13. Added text to Root Tutorial pointer. Changed cdf to Fermi Systems

June 16, 1999

0.4

S. Panacek

Updated links to sample file and cursor types.

June 17, 1999

0.5

E. Lyons

Added Part 1 to First session heading and minor wording changes to text

June 17, 1999

0.6

Elaine Lyons

Added section for using ROOT's Class and Members Reference

June 18,1999

0.6

E.Lyons

Text changes and added pointer to How to use graphics Editor

June 23, 1999

06

S.Panacek

Add the images as part of the document

 

 

 

 

 

 

June 15, 1999

0.2

Suzanne Panacek

Converted to .doc file for better formatting.Changed wording from folder to tree. Added rotating the lego plot.

June 16,1999

0.3

Elaine Lyons

Changed wording on introductory page to make the structure of the document clearer.

p2. Bottom- Removed word "always" from " a good idea"

p3 e-4  changed "look like this"->"as shown"  e-2 "histogram drawing of the.." to " display a 1-D histogram of the.."

p6 last sentence  changed"displaying the fit" to "performing the fit"

p9 e-1 "size of button" to " size of pad"

p10  2. "enter options as follows" to "enter options as shown"

p12.  Last paragraph: added ascii file

p13. Added text to Root Tutorial pointer. Changed cdf to Fermi Systems

June 16, 1999

0.4

S. Panacek

Updated links to sample file and cursor types.

June 17, 1999

0.5

E. Lyons

Added Part 1 to First session heading and minor wording changes to text

June 17, 1999

0.6

Elaine Lyons

Added section for using ROOT's Class and Members Reference

June 18,1999

0.6

E.Lyons

Text changes and added pointer to How to use graphics Editor

June 23, 1999

06

S.Panacek

Add the images as part of the document