User Tools
asc:tutorials:2014october28
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Last revision Both sides next revision | ||
|
asc:tutorials:2014october28 [2014/10/28 16:03] asc [Lesson 2: Using pyROOT to read xAOD] |
asc:tutorials:2014october28 [2014/10/29 13:53] asc old revision restored (2014/10/28 16:33) |
||
|---|---|---|---|
| Line 95: | Line 95: | ||
| __Method 1. If you are at ANL, copy it__: | __Method 1. If you are at ANL, copy it__: | ||
| <code bash> | <code bash> | ||
| - | cp / | + | cp / |
| - | AOD.01482225._000140.pool.root | + | |
| </ | </ | ||
| Line 104: | Line 103: | ||
| localSetupFAX --rootVersion=current-SL6 | localSetupFAX --rootVersion=current-SL6 | ||
| voms-proxy-init -voms atlas | voms-proxy-init -voms atlas | ||
| - | xrdcp $STORAGEPREFIX/ | + | xrdcp $STORAGEPREFIX/ |
| </ | </ | ||
| Line 120: | Line 119: | ||
| setMeUpData anl-oct2014 mydata | setMeUpData anl-oct2014 mydata | ||
| </ | </ | ||
| - | The file will appear in " | + | The file will appear in " |
| Line 196: | Line 195: | ||
| Using this code, one can fill histograms. But the code runs slow. Below we will show how to use C++/ROOT compiled code to | Using this code, one can fill histograms. But the code runs slow. Below we will show how to use C++/ROOT compiled code to | ||
| run over this file. | run over this file. | ||
| + | |||
| + | How do you know about methods of " | ||
| + | |||
| + | <code python> | ||
| + | print dir(el.trackParticle()) | ||
| + | </ | ||
| How will you find xAOD variables without using ROOT TBrowser? Try this code: | How will you find xAOD variables without using ROOT TBrowser? Try this code: | ||
| Line 204: | Line 209: | ||
| </ | </ | ||
| - | You will see a table with the names of the variables. | + | |
| + | <note warning> | ||
| + | To run the next example, please start from a new terminal, run rcSetup. This is needed to avoid a conflict with asetup</ | ||
| Now you can fill a histogram in this Python code. You should create a histogram before the event loop: | Now you can fill a histogram in this Python code. You should create a histogram before the event loop: | ||
| Line 259: | Line 267: | ||
| Now open the root file and look at the histogram. | Now open the root file and look at the histogram. | ||
| - | ====== Lesson 3: Analysis | + | ====== Lesson 3: C++/ |
| - | Now we will create a C++/ROOT analysis program and run over this input xAOD file. Do not forget to run "kinit [email protected]" | + | Now we will create a C++/ROOT analysis program and run over this input xAOD file. |
| Use the same setup file as above. | Use the same setup file as above. | ||
| Line 285: | Line 293: | ||
| python Make_input < | python Make_input < | ||
| </ | </ | ||
| + | |||
| + | In case if you need xAOD data, do this: | ||
| + | |||
| + | <code bash> | ||
| + | mkdir data | ||
| + | cd data | ||
| + | localSetupFAX --rootVersion=current-SL6 | ||
| + | voms-proxy-init -voms atlas | ||
| + | xrdcp $STORAGEPREFIX/ | ||
| + | xrdcp $STORAGEPREFIX/ | ||
| + | xrdcp $STORAGEPREFIX/ | ||
| + | </ | ||
| + | |||
| + | and run: | ||
| + | |||
| + | < | ||
| + | cd .. | ||
| + | python Make_input data | ||
| + | </ | ||
| + | Now inputdata.txt should pick up your xAOD files. | ||
| + | |||
| + | |||
| Now the input file is ready and we run the example as: | Now the input file is ready and we run the example as: | ||
| Line 303: | Line 333: | ||
| To do this we will need a number of changes: | To do this we will need a number of changes: | ||
| - | 1) We need to link several ATLAS packages. | + | 1) We need to link several ATLAS packages |
| < | < | ||
| Line 311: | Line 341: | ||
| in " | in " | ||
| - | 2) Then we need to modify 2 places to put histograms | + | 2) Then we need to modify 2 places to put histograms |
| <code python> | <code python> | ||
| Line 363: | Line 393: | ||
| TBrowser a | TBrowser a | ||
| </ | </ | ||
| - | and look at the histograms | + | and look at the histograms |
asc/tutorials/2014october28.txt · Last modified: 2014/10/29 13:55 by asc
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: Public Domain
