Histogram operations

Perform operations on histograms read from file and save results
1     HISTOGRAM/FILE 1 PAWHISTS.HBOOK ! U                                                      
      hrin  *
      zon 2 2
      opt grid
      set mtyp 26
      hi/pl 110 e
      hi/pl 110 pl
      zon 1 2 2 s
2     HI/OP/ADD 110 110 120 0.5 0.                                                             
      hi/op/add 110 110 130 0.25 0.
      set htyp 245
      hi/pl 110
      set htyp 254
3     HI/PL //PAWC/120 s                                                                       
      set htyp 253
      hi/pl //PAWC/130 s
      text 0.55 95. 'LEP Very Preliminary' 0.35 25.
      hrout 0

The option `` U '' (for Update) in the command HIST/FILE , is used when the user wants to change the content of an existing histogram file by adding a new histogram ( HROUT ) or deleting an histogram ( HSCRATCH ).
It is possible to perform operations between histograms like addition with the commands in the menu HISTOGRAM/OPERATIONS .
The memory, like the attached files, can be considered as a directory. This is the current directory by default and //PAWC is its name. The command HI/PL //PAWC/id plots the histogram `` id '' in memory while the current directory is //LUN1 .

Some ``cosmetic modifications'' on PAWEX13
      histogram/file 1 pawhists.hbook ! u
      hrin  0
      zon 2 2
      opt grid
1     SET *FON -60                                                                             
2     SET BWID 4                                                                               
3     SET BCOL 1.5                                                                             
      set mtyp 26
      hi/pl 110 e
      hi/pl 110 pl
      zon 1 2 2 s
      hi/op/add 110 110 120 0.5 0.
      hi/op/add 110 110 130 0.25 0.
      set htyp 245
      hi/pl 110
      set htyp 254
      hi/pl //pawc/120 s
      set htyp 253
      hi/pl //PAWC/130 s
4     SET CHHE .35                                                                             
4     SET TANG 25.                                                                             
4     ITX 0.55 95. 'LEP Very Preliminary'                                                      
      hrout 0

All the text fonts used for HISTO/PLOT are set to -60.
The line width for the boxes around the histograms is set to 4 pixels. Like for the fonts it is possible to do SET *WID to set all the width available in the SET command.
The color of the shadow around the histograms is set to 5 (Yellow), it appears grey on black and white PostScript printers.
To access hardware fonts (ie PostScript fonts) the command ITX and its related attributes should be used.

			PAW Tutorial	Last update: 1999/04/01 14.58	Olivier.Couet@Cern.Ch