Well, I never heard if there was anything wrong with my suggestion. Certainly I provided a way to be able to get the info he wants, so that he could mine across it.
Rob
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Question
How do i Use Sequence Clustering Algorithm to capture events
This is the table that i have
StudentID ClassID CentreID EnrollType History JoinYear Month
1000020 1 1 NEW Student NULL 2005 JAN
1000020 2 1 Current NuLL 2005 JAN
1000020 3 1 Current NuLL 2005 JAN
1000020 2 1 EXIT NuLL 2005 JAN
1000099 4 3 NEW STudent NULL 2007 MAR
1000104 2 5 Internal Transfer NULL 2009 MAR
..........................
I need to use SEQUENCE Clustering algorithm to capture events. For example
STUDENT JOIN EVENT
IF the StudentID(j-1) < > Student(j) & enroltype= "NEWSTUDENT" ----> student joined at "j"
IF the StudentID(j-1) < > Student(j) & enroltype= "Internal Transfer" ----> student joined at "j"
Each student has multiple records .
When this above condition occurs , Few attributes like firstname, lastname ,joinyear have to be displayed.
Can anyone please tel me how i could implement this using sequence clustering algorithm. All the data is coming from one single table. What would go in my nested table and case table.???? Do i have to make use MDX to solve this problem.
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by: rob_farleyPosted on 2009-06-24 at 23:05:27ID: 24708600
I would do this using T-SQL instead.
with numbered_rows as
(select row_number() over (order by StudentID, ClassID, CentreID) as rn, *
from dbo.Students)
select sCurr.*, case when sCurr.StudentID <> sPrev.StudentID then 'New Student' end as IsNewStudent /* Add more examples like this */
from dbo.Students sCurr
join
dbo.Students sPrev
on sCurr.rn = sPrev.rn + 1;
Now you can easily do the comparisons you want to do, and then use this new dataset for the Data Mining.
Rob