Simple selection criteria on Ntuple

Ntuple SCAN and the use of simple selection criteria
      hi/file 2 rwn_aptuple.hbook
      hi/file 3 cwn_aptuple.hbook
4     ALIAS/CREATE DIVEP 5                                                                     
      alias/create NATFR 7
      cd //pawc
      *
1 2   NT/SCAN //LUN2/10 nation=NATFR.and.division=DIVEP _                                    
      ! ! ! age service children grade nation
1 2   NT/SCAN //LUN3/11 nation='FR'.and.division='EP'  _                                     
      ! ! ! age service children grade nation
      *
      hi/cr/1d 200 'Number of years at CERN' 35 0. 35.
      max 200 250
      set ndvx 507
      set htyp 235
3     NT/PL //LUN2/10.SERVICE IDH=200                                                          
5     ATITLE 'Years at CERN' 'Number of staff'                                                 
      set htyp 253
2 3   NT/PL //LUN3/11.SERVICE NATION='FR' OPTION=S IDH=200                                   
      set htyp 250
      nt/pl //LUN3/11.Service division='EP'.and.nation='FR' OPTION=S IDH=200

NT/SCAN prints in an alphanumeric way the content of an Ntuple. On the next page is given the output of this command both for RW and CW Ntuples.
In the commands NT/PLOT and NT/SCAN , the second parameter is the selection criteria. Only the events satisfying this selection are taken into account. Note that with CWN character strings can be used.
By default NT/PLOT fill an histogram with the indentifier IDH=1000000 . The next invocation of this command will overwrite the content of this histogram. IDH may have been created with H/CREATE . Before filling IDH , the contents of IDH are reset if IDH already exists. Note that IDH not equal to 1000000 is a convenient way to force user binning. This is used here. We'll see later another way to fill an histogram with data read in an Ntuple.
Note also:
The aliases allow to define shortcut abbreviations. The aliases are known globally e.g. in all macros and in command mode.
ATITLE allows to define the title on the axis.

NT/SCAN output for a Row Wise Ntuple
 +-------+-------------+-------------+-------------+-------------+-------------+
 | ENTRY |   AGE       |   SERVICE   |   CHILDREN  |   GRADE     |   NATION    |
 +-------+-------------+-------------+-------------+-------------+-------------+
 |    48 |   56.000    |   34.000    |   .00000E+00|   7.0000    |   7.0000    |
 |   194 |   62.000    |   27.000    |   .00000E+00|   7.0000    |   7.0000    |
 |   213 |   56.000    |   26.000    |   .00000E+00|   6.0000    |   7.0000    |
 |   214 |   45.000    |   26.000    |   .00000E+00|   6.0000    |   7.0000    |
 |   216 |   56.000    |   19.000    |   .00000E+00|   5.0000    |   7.0000    |
 |   266 |   63.000    |   26.000    |   .00000E+00|   13.000    |   7.0000    |
 |   267 |   59.000    |   32.000    |   .00000E+00|   13.000    |   7.0000    |
 |   273 |   55.000    |   26.000    |   1.0000    |   12.000    |   7.0000    |
 |   275 |   53.000    |   26.000    |   1.0000    |   11.000    |   7.0000    |
 |   279 |   51.000    |   30.000    |   .00000E+00|   6.0000    |   7.0000    |
 |   315 |   56.000    |   25.000    |   .00000E+00|   8.0000    |   7.0000    |
 |   318 |   64.000    |   26.000    |   .00000E+00|   6.0000    |   7.0000    |
 |   320 |   49.000    |   26.000    |   .00000E+00|   6.0000    |   7.0000    |
 |   327 |   59.000    |   19.000    |   .00000E+00|   5.0000    |   7.0000    |
 |   328 |   51.000    |   25.000    |   .00000E+00|   5.0000    |   7.0000    |
 +-------+-------------+-------------+-------------+-------------+-------------+
More...? ( /N/G ) n
 ==>     15 events have been scanned

NT/SCAN output for a Column Wise Ntuple
 +-------+-------------+-------------+-------------+-------------+-------------+
 | ENTRY |   AGE       |   SERVICE   |   CHILDREN  |   GRADE     |   NATION    |
 +-------+-------------+-------------+-------------+-------------+-------------+
 |    48 | 56          | 34          | 0           | 7           | FR          |
 |   194 | 62          | 27          | 0           | 7           | FR          |
 |   213 | 56          | 26          | 0           | 6           | FR          |
 |   214 | 45          | 26          | 0           | 6           | FR          |
 |   216 | 56          | 19          | 0           | 5           | FR          |
 |   266 | 63          | 26          | 0           | 13          | FR          |
 |   267 | 59          | 32          | 0           | 13          | FR          |
 |   273 | 55          | 26          | 1           | 12          | FR          |
 |   275 | 53          | 26          | 1           | 11          | FR          |
 |   279 | 51          | 30          | 0           | 6           | FR          |
 |   315 | 56          | 25          | 0           | 8           | FR          |
 |   318 | 64          | 26          | 0           | 6           | FR          |
 |   320 | 49          | 26          | 0           | 6           | FR          |
 |   327 | 59          | 19          | 0           | 5           | FR          |
 |   328 | 51          | 25          | 0           | 5           | FR          |
 +-------+-------------+-------------+-------------+-------------+-------------+
More...? ( /N/G ) n
 ==>     15 events have been scanned

			PAW Tutorial	Last update: 1999/04/01 14.59	Olivier.Couet@Cern.Ch