histogram/file 45 pawhists.hbook
zone 1 2
set htyp 245
1 H/PL 120 K
set htyp 254
1 H/PL 110
set htyp
2 H/PL 110 +
set htyp 144
hi/pl 130 +
The option `` K '' in the command HIST/PLOT keep the histogram
in memory at the graphics level to allows updating. If no zone is
defined, the option `` K '' is not necessary.
If an histogram is kept in memory (automatically or via option
`` K '') it is possible to add the content of an other histogram
with option ``+''.
