[cs615asa] Wrong Answers

[Hongkun Zhang]

The same. This url is blank now.

Zhitao Chen <zchen69 at stevens.edu>于2018年4月6日 周五19:22写道：

> I cannot open the link(
> http://ec2-54-145-67-75.compute-1.amazonaws.com/cgi-bin/hw5-1.cgi) to
> submit answer now, is there anyone has the same problem?
>
> On Fri, Apr 6, 2018 at 6:04 PM, Jan Schaumann <jschauma at stevens.edu>
> wrote:
>
>> Since I want to avoid all of you wasting time, here are the answers that
>> I came up with.  You can use those as a basis to check your method (many
>> other ways of finding the answers exist) or to discuss which one is the
>> right answer:
>>
>> Jason G Ajmo <jajmo at stevens.edu> wrote:
>>
>> > 1:
>> > # gzcat data.gz | grep "^en[\. ]" | wc -l
>> >  2233318
>>
>> That's correct.  I don't know why I had the wrong answer, but chances
>> are it has to do with me trying to reconstruct the assignment and ending
>> up using a different dataset.  I'm sorry about that.
>>
>> FYI: You can save yourself a few extra processes by using a single grep
>> command:
>>
>> zgrep -c "^en[\. ]" pagecounts-20160803-090000.gz
>>
>> > 2:
>> > # gzcat data.gz | grep "^en[\. ]" | awk '{ print $2 " " $(NF - 1) }' |
>> sort -nrk 2 | head -n 1
>> > en 3127515
>>
>> I think that answer should be right, too.  I ended up doing:
>>
>> gzcat data.gz | awk '/^en[\. ]/ { print $(NF - 1) " " $0 }' | sort -n |
>> tail -1
>>
>> By using / matching in awk, I'm avoiding an extra grep(1) process.  If
>> you want, you can do the whole thing in awk, too, including the sorting
>> and extraction, but it becomes less pipe-liney that way.
>>
>>
>> For #3, I (now) ended up with:
>>
>> gzcat data.gz | awk '/^en[\. ]/ { sum += $NF; } END { print sum ; }'
>>
>> yielding '260243085755'.
>>
>>
>> For #4:
>>
>> $ gzcat data.gz | awk '/^en[\. ]/ { sum += $(NF - 1); } END { print sum /
>> 3600 ; }'
>> 3256.12
>>
>> For #5:
>>
>> $ gzcat data.gz | awk '/^en[\. ]/ {s = $NF / $(NF - 1);
>>         if (s > l) { l = s; largest = $2; }}
>>         END { print largest; }'
>> Module:Syrian_and_Iraqi_insurgency_detailed_map/doc
>>
>>
>> The important lesson in this first part of the assignment is to always
>> seek clarification, ask questions, and to not blindly trust that your
>> instructor (or the test framework you are using, as which I function
>> here) is necessarily correct.
>>
>> Keep that in mind for the second and third part of the assignment...
>>
>> -Jan
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>>
>
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