ST590G -- FALL 2011 
     
  Class Exercise #6 -- Thursday, 27 October 2011

  Our Group ___________________________________________________

    In the '/Class/ST590G' directory on the 'login' machine are several
    files of weekly weblogs from the Department of Statistics www4 web 
    server.  We will look at one file that has 50,000-60,000 records.
    You may want to debug using a smaller files: either 'start' with
    100 records or 'w4000log' with 1000 records.  An explanation of the 
    fields is at the bottom.

    1) Are the number of requests uniformly distributed throughout the
    day?  Get the number of requests by hour of the day, or minute,
    or second (or 10 seconds).

    2) Create a table of requests for each faculty id.  Who is
       the most popular faculty member on the Web?

    3) Subset either (1) or (2) for only requests that come from
       the neighborhood: 
          152.1.*.*   NCSU fixed addresses
          152.14.*.*  wireless addresses
          152.2.*.*   UNC-Chapel Hill

       Brief explanation of 'Common Log Format'
        requestor - - [date/time timezone] "GET filerequest protocol"
          statuscode filesize

       Here are 3 records:

67.195.115.229 - - [18/Jul/2010:04:05:37 -0400] "GET /~dickey/SAScode/SUGI03/ HTTP/1.0" 200 1555
207.46.204.188 - - [18/Jul/2010:04:07:52 -0400] "GET /~weems/conferences0910.html HTTP/1.1" 200 3402
67.195.115.229 - - [18/Jul/2010:04:08:48 -0400] "GET /~davidian/st810a/ttest.R HTTP/1.0" 200 3150

       so in the first case, 67.195.115.229 is the IP address of the
       requesting computer, -0400 is the timezone, HTTP/1.0 is the 
       protocol (most are HTTP, a few FTP), 200 is the status code for a 
       successful request, and 1555 is the size of the file.  Other
       codes are 3xx for redirection, 4xx client error, 5xx server error.

       *** Note that in the directory structure, the character '~' may 
       appear as '%7e' or '%7E' since its ascii code is '7e'.