Admin: classes canceled thursday

[Tim Menzies]

On Sep 8, 6:28 pm, Tim Menzies <menzies....@gmail.com> wrote:
> This will be the thread containing all admin notices.

FYI: lectures are canceled for Thursday (i expect to be too brain
fried from marking projects)

[Tim Menzies]

On Sep 8, 6:28 pm, Tim Menzies <menzies....@gmail.com> wrote:
>
> > This will be the thread containing all admin notices.
>

dear 500 students: i am still working on your proj2 description. in
the meantime, have a look at the 400-level project: it has notes on
8*7*10*4*13=29,120 different learners.

dear 400 students: please see http://code.google.com/p/ourmine/wiki/Cs473proj2
for the description of your next project.

t

[Tim Menzies]

http://code.google.com/p/ourmine/wiki/Cs573proj2

enjoy!

t

[Tim Menzies]

please select your demo time. and remember: first in, best dressed

http://spreadsheets.google.com/ccc?key=0AqtLfKAJzgNrdDBuRW9zVUJsYVkwYWw1S0ZLd1E0UlE&hl=en

and remember the structure:
- bring that envelope commenting on your colleagues

t

[Tim Menzies]

due to a clerical error on my part, the results of four surveys were
not correctly entered, even after the surveys themselves were shredded

therefore (and sorry*100 for this), the following people need to fill
in the questionnaire and bring it to class

William Kovalick
Edward Lockard
Lee Blake

t

btw, the surveys are at: http://groups.google.com/group/csx73/web/jq.pdf

On Oct 10, 2:21 pm, Tim Menzies <menzies....@gmail.com> wrote:
> please select your demo time. and remember: first in, best dressed
>

> http://spreadsheets.google.com/ccc?key=0AqtLfKAJzgNrdDBuRW9zVUJsYVkwY...

[Tim Menzies]

correction to previous email: see the correct list of student names,
below

On Oct 10, 7:45 pm, Tim Menzies <menzies....@gmail.com> wrote:
> due to a clerical error on my part, the results of four surveys were
> not correctly entered, even after the surveys themselves were shredded
>
> therefore (and sorry*100 for this), the following people need to fill
> in  the questionnaire and  bring it to class
>

William Kovalick
Edward Lockard
Lee Blake

James Dunlevy

[will]

i'm confused. does this mean we did it wrong? or that we need to
bring in another copy of what we brought before?

[Tim Menzies]

On Sat, Oct 10, 2009 at 11:50 PM, will <will...@gmail.com> wrote:
>
> i'm confused.  does this mean we did it wrong?  or that we need to
> bring in another copy of what we brought before?

you did not do it wrong- the error was on my part.

please bring on another filled in questionnaire.

sorry for the inconvenience

t

>
> On Oct 10, 9:39 pm, Tim Menzies <menzies....@gmail.com> wrote:
>> correction to previous email: see the correct list of student names,
>> below
>>
>> On Oct 10, 7:45 pm, Tim Menzies <menzies....@gmail.com> wrote:
>>
>> > due to a clerical error on my part, the results of four surveys were
>> > not correctly entered, even after the surveys themselves were shredded
>>
>> > therefore (and sorry*100 for this), the following people need to fill
>> > in  the questionnaire and  bring it to class
>>
>> William Kovalick
>> Edward Lockard
>> Lee Blake
>> James Dunlevy
>>
>> > t
>>
>> > btw, the surveys are at:http://groups.google.com/group/csx73/web/jq.pdf
>>
>> > On Oct 10, 2:21 pm, Tim Menzies <menzies....@gmail.com> wrote:
>>
>> > > please select your demo time. and remember: first in, best dressed
>>
>> > >http://spreadsheets.google.com/ccc?key=0AqtLfKAJzgNrdDBuRW9zVUJsYVkwY...
>>
>> > > and remember the structure:
>> > > - bring that envelope commenting on your colleagues
>>
>> > > t

--
there are those who call me... (dr) timm (menzies)?
morgantown (39.6n, -79w), usa
assoc prof csee, wvu
http://menzies.us

'Hydrogen is a light, odorless gas, which, given enough time, turns
into people.'

[Tim Menzies]

All students: the project3 specification is now on-line at
http://code.google.com/p/ourmine/wiki/Proj3.

Enjoy!
:-)

t

[Tim Menzies]

for the text mining work, please see
http://unbox.org/wisp/trunk/fastforward/RatingTool/build/studentBuild1.zip

note that:

a) this zip contains instructions.pdf, which you need to read.

b) you need to complete at least one task per week (for 4 weeks).

c) we will be tracking who is late sending back their results. you
will lose one mark for each day late returning them (so get them in
BEFORE midnight next monday)

t

p.s. please try to do at least some work on this before thursday- we
need to work out if this task is impossibly complicated or simple.

[Tim Menzies]

http://code.google.com/p/ourmine/wiki/LectureNaiveBayes

t

[Edward Lockard]

Just to double-check, the p in the infogains formula is the probability of something being a value, correct?

info-gain = summation of ((probability)^2) * log(probability)

[Tim Menzies]

remember all logs are base two.

and to derive the formula...

let classes c1 c2 c3 occur at frequency n1 n2 n3

let N = n1 + n2 + n3

so
p(c1) = n1/N
p(c2) = n2/N
p(c3) = n3/N

i(x) = -p(x) * log_2(p(x))

weighted sum over all classes

= n1/N * i(c1) + n2/N * i(c2) + n3/N * i(c3)

= p(c1) * i(c1) + p(c2) * i(c2) + p(c3) * i(c3)

= -p(c1)^2 * log_2(p(c1)) - p(c2)^2 * log_2(p(c2)) - p(c3)^2 * log_2(p(c3))

--

[Tim Menzies]

http://code.google.com/p/ourmine/wiki/LectureEval

enjoy!
:-)

t