access.istat Verb: Access/Access: Verbs

access.istat

Command access.istat Verb: Access/Access: Verbs
Applicable release versions: AP, R83
Category Access: Verbs (152)
Description produces a graphic representation of item-id distribution within a file and suggests a new modulo.

It's counterpart is the "hash-test" command.
Syntax istat file.reference {itemlist} {modlist} {(options)}
Options * see "options: Access".
r Provides additional information about indirect (pointer) items, which are otherwise not acurately reflected by the output.
s Suppresses display of histogram; displays summary statistics only.
Example
istat entity (s 

file = entity  modulo= 11               16:08:40 12 Oct 1993
frames bytes items
          11
            Hash-Test/Istat Statistics

total item count =     8        byte count =       2226
 avg. bytes/item = 270.2  avg. items/group =          3
  std. deviation =   1.0  avg. bytes/group =      202.3
suggested modulo =   3.0
Purpose
Related file.reference
access.verbs
tcl.item
access.hash-test
access.options
modulo
tcl.f-resize
tcl.resize
tcl.nframe-index
filename.file-of-files
pointer.item