awk - find average interarrival times for each unique page
All,
I have a test file as specified below. 1st col is <arrival time> and 2nd col is <Page #>. I want to find the inter-arrival time of requests for each page # (I've done this part already). Once I have this, I want to calculate the average interarrival time. Note, that I am trying to have the average interarrival time for the requests that arrive for each unique page. In other words, I don't want the average inter-arrival time for all of the requests in the trace with no respect to pages, b/c that would be trivial to do.
I know how to do the calculation but my problem is I'm not sure what the best way to store these would be. Before I calculate it, I probably need to store all of the inter-arrival times for each unique page first, then I can calculate the average. Or maybe someone knows of an easier way to do this. Here is my example.
My testfile.txt (the file is sorted by Page # (2nd col))
For the average inter-arrival time, I would just add all the interarrival times up for that page and then divide by [the number of requests for that page - 1]. It is minus one because it is the inter-arrival time between 2 requests.
My desired output should be something like this:
Here is the code I have so far.
Thank you in advance for your help!
Jonathan
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Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
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Discussion started by: tugar
15 Replies
LEARN ABOUT CENTOS
ipptool
ipptool(1) Apple Inc. ipptool(1)NAME
ipptool - perform internet printing protocol requests
SYNOPSIS
ipptool [ -4 ] [ -6 ] [ -C ] [ -E ] [ -I ] [ -L ] [ -S ] [ -T seconds ] [ -V version ] [ -X ] [ -c ] [ -d name=value ] [ -f filename ] [ -i
seconds ] [ -n repeat-count ] [ -q ] [ -t ] [ -v ] URI filename [ ... filenameN ]
DESCRIPTION
ipptool sends IPP requests to the specified URI and tests and/or displays the results. Each named file defines one or more requests,
including the expected response status, attributes, and values. Output is either a plain text, formatted text, CSV, or XML report on the
standard output, with a non-zero exit status indicating that one or more tests have failed. The file format is described in ipptoolfile(5).
OPTIONS
The following options are recognized by ipptool:
-4 Specifies that ipptool must connect to the printer or server using IPv4.
-6 Specifies that ipptool must connect to the printer or server using IPv6.
-C Specifies that requests should be sent using the HTTP/1.1 "Transfer-Encoding: chunked" header, which is required for conformance by
all versions of IPP. The default is to use "Transfer-Encoding: chunked" for requests with attached files and "Content-Length:" for
requests without attached files.
-E Forces TLS encryption when connecting to the server using the HTTP "Upgrade" header.
-I Specifies that ipptool will continue past errors.
-L Specifies that requests should be sent using the HTTP/1.0 "Content-Length:" header, which is required for conformance by all versions
of IPP. The default is to use "Transfer-Encoding: chunked" for requests with attached files and "Content-Length:" for requests without
attached files.
-S Forces (dedicated) SSL encryption when connecting to the server.
-T seconds
Specifies a timeout for IPP requests in seconds.
-V version
Specifies the default IPP version to use: 1.0, 1.1, 2.0, 2.1, or 2.2. If not specified, version 1.1 is used.
-X Specifies that XML (Apple plist) output is desired instead of the plain text report. This option is incompatible with the -i (inter-
val) and -n (repeat-count) options.
-c Specifies that CSV (comma-separated values) output is desired instead of the plain text output.
-d name=value
Defines the named variable.
-f filename
Defines the default request filename for tests.
-i seconds
Specifies that the (last) file should be repeated at the specified interval. This option is incompatible with the -X (XML plist out-
put) option.
-l Specifies that plain text output is desired.
-n repeat-count
Specifies that the (last) file should be repeated the specified number of times. This option is incompatible with the -X (XML plist
output) option.
-t Specifies that CUPS test report output is desired instead of the plain text output.
-v Specifies that all request and response attributes should be output in CUPS test mode (-t). This is the default for XML output.
COMPATIBILITY
The ipptool program is unique to CUPS.
EXAMPLES
Get a list of completed jobs for "myprinter":
ipptool ipp://localhost/printers/myprinter get-completed-jobs.test
Send email notifications to "user@example.com" when "myprinter" changes:
ipptool -d recipient=mailto:user@example.com ipp://localhost/printers/myprinter create-printer-subscription.test
STANDARD FILES
The following standard files are available:
color.jpg
create-printer-subscription.test
document-a4.pdf
document-a4.ps
document-letter.pdf
document-letter.ps
get-completed-jobs.test
get-jobs.test
get-printer-attributes.test
gray.jpg
ipp-1.1.test
ipp-2.0.test
ipp-2.1.test
ipp-2.2.test
onepage-a4.pdf
onepage-a4.ps
onepage-letter.pdf
onepage-letter.ps
print-job.test
testfile.jpg
testfile.pdf
testfile.ps
testfile.txt
SEE ALSO ipptoolfile(5),
http://localhost:631/help
COPYRIGHT
Copyright 2007-2013 by Apple Inc.
9 November 2010 CUPS ipptool(1)