Why The Node_distribution.PROBABILITY Greater Than 1 In Clustering Algorithm?
Nov 24, 2006
Hi, all experts here,
Thank you very much for your kind attention.
I am having a question about the node_distribution.PRABABILITY. Some of the attribute values though have a small number of support for the specific node, but why it has a big node_distribution.probability even greater than 1? How can the node_distribution.PROBABILITY be greater than 1? How dose SQL Server 2005 data mining engine calculate the node_distribution.PRPBABILITY for its Clustering algorithm? Really confused and need guidance for that.
Thank you very much for your help.
With best regards,
Yours sincerely,
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Nov 24, 2006
Hi, all here,
Thank you very much for your kind attention.
I dont understand another problem within my mining model. When I query the mining model content ,finding that the same attribute_value have different support and probability for the same node within my clustering model. Why is that? Really confused. And really need help for that.
Thank you very much in advance for your help.
With best regards,
Yours sincerely,
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Oct 29, 2007
Hi All!
I have few questions regarding Clustering algorithm.
If I process the clustering model with Ks (K is number of clusters) from 2 to n how to find a measure of variation and loss of information in each model (any kind of measure)? (Purpose would be decision which K to take.)
Which clustering method is better to use when segmenting data K-means or EM?
Thanks in advance!
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Dec 5, 2006
Hi, all here,
Since we are not able to use accuracy chart for Clustering algorithms there. So how can we verify the accuracy of clustering algorithm models here in terms of its classification and regression tasks?
Thank you very much in advance for your guidance and advices for that.
With best regards,
Yours sincerely,
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May 1, 2007
Hi, all experts here,
Thank you very much for your kind attention.
I have a question on sequence clustering algorithm. As generally it is used for sequence analysis especially for web path visiting analysis. Besides that, what else scenarios could we apply this algorithm as well?
Thanks a lot in advance and I am looking forward to hearing from you shortly.
With best regards,
Yours sincerely,
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Mar 2, 2007
hi,
I am having data like this
Studid Date Perf
001 01/01/2008 90
001 02/01/2008 89 Cluster 1
001 03/02/2008 91
002 01/01/2008 75
002 02/01/2008 79 Cluster 2
002 03/02/2008 69
I wants to create two clusters cluster1 for studid 001. cluster2 for studid 002.
How to write Prediction Query using clustering algorithm?
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Jan 9, 2008
Well, i need a piece of code that return me the schema rowset of a desicion tree and let me iterate me on it. I need some columns like node_type, node_unique_name.... etc.. And another question is that the node_distribution has multiple rows of information. How can i access them. I think there must be a adomddatareader object to iterate on them..
Well thanks a lot for your responses...
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Dec 5, 2006
Hi, all here,
Thank you very much for your kind attention.
Just noticed that the sum of node_distribution.support value is not equal to the value of node_support for a specific node in my Microsoft Clustering Algorithm Model? If so, how can I correctly count the distribution of each attribute value among all?
Really confused.
And thank you very much in advance for any guidance and advices for that. Looking forward to hearing from you shortly.
With best regards,
Yours sincerely,
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Apr 12, 2007
hi,
i have a exercise using association datamining
my database have 350 records,
i use 90 records for datamining and it release some rules which i choose on top of mSOLAP_NODE_SCORE,
but when i use select statement to check my result i have 1 records, the same as my result, and 5 records not true;
for example:
rules A=a,B=b-> C=c
select * from <my_table> where A='a' and B='b' and C='c'; ==>1 record return
select * from <my_table> where A='a' and B='b' and C<>'c'; ==>5 records return
C with 3 values c1,c2,c
with the second statement C includes 2 c1 and 3 c2
i don't understand how they work.
i want to choose some best rules can present my database.
how can i choose importance and probability to get best rules.
with database have 90 records and a database have 350 records which values i should use for minimum_probability, Minimum_Support, Minimum_importance...
when i choose rules i should choose on importance or probability.
thanks for your help
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Dec 13, 2006
Hello,
I installed the bike buyer example and i am learning the DMX language. Now i wrote the following query (using MS decision trees):
SELECT
T.[Last Name],
[Bike Buyer],
PredictProbability(Predict([Bike Buyer])) AS [Probability]
From
[v Target Mail]
PREDICTION JOIN
OPENQUERY
(....... And so on..)
Now the result is surprising to me. In the resulttabel all the probabilities are equal.
Bike Buyer Probability
1 0.99994590500919611
0 0.99994590500919611
0 0.99994590500919611
0 0.99994590500919611
0 0.99994590500919611
1 0.99994590500919611
and so on.
Now i am wondering what predictProbability means. I thought that PredictProbability meant the probability that the prediction is correct. Now all the probabilities are the same and the input is different. Can somebody tell me what PredictProbability means or am I using it wrong?
Thanx in advance,
Joris Valkonet
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Mar 14, 2008
I have a DMX query like this:
Code Snippet
select * from (
select flattened(*) from (
select att1, topcount(predict([Trans Predictor Unified], INCLUDE_STATISTICS), $Adjustedprobability, 7) as predictedstuff
from [Trans Predictor Model]
prediction join
SHAPE {openquery(DMSCS, 'select distinct CAST(att2 as nvarchar(100)) att1 from DMSCS.dbo.CartProducts order by att1 ')}
append
({openquery(DMSCS, 'select CAST(att2 as nvarchar(100)) att1 , att4, att5 as att3
from DMSCS.dbo.CartProducts order by att1 ')
}
relate [att1] to [att1]) as [Trans Predictor Unified]
as SHAPEQ
on [Trans Predictor Model].[Trans Predictor Unified].att3 = SHAPEQ.[Trans Predictor Unified].att3
) as s
) as t where [predictedstuff.$AdjustedProbability] > 0.5
It's working well. I would like to modify one thing. I would like to chang ethe constant in the where condition, so that it is configurable. That is, I would like to store the constant somewhere (SSAS or relational SQL). I was reading the DMX reference, but it doesn't provide much details about the where's "condition expression". And I looked at a document called "OLE DB for Data Mining Specification version 1.0" of July 2000, which does have in Appendix B the SELECT grammar. There it has
<expression> -> <value>
[...]
| ( SELECT <expression_list> FROM <expression> <where_clause>
[...]
<where_clause> -> WHERE <expression>
If I change the end to
where [predictedstuff.$AdjustedProbability] > (select 0.5 from [Trans Predictor Model] )
, however, just to force some form of query there I get a message saying "The specified column was not found in the context".
I'm running SQL Server 2005.
thanks,
Gustavo
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Jun 28, 2007
I am working on a text mining application wherein I need to detect unusual/anomalous sentences in text. Certain sentences, that I know occur very frequently, are given a likelihood of 0.2 by PredictCaseLikelihood. Other sentences that are just as frequent get a much higher likelihood (>0.9). I am using the NORMALIZED option. The only significant difference between these sentences is their length. The one with the lower likelihood has only 2 words in it, whereas the one with the higher likelihood has more than 10 words. The problem is that the shorter sentences end up being interpreted as anomalous, when in fact they are'nt. Any suggestions?
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Jul 16, 2007
Hi, all,
I am confused about the value of Probability of Value 1 or 2 (on a particular attribute value) in Neural Network viewer. E.g. the value of Probability of value 1 is actually very low (the same to the value of Probability of value 2), but why the bar which shows the strength of the probability of these two values are still so strong even stronger than other values of probability of value 1 or 2 based on other attribute values which have a much higher probability of value 1 or 2?
And how does the algorithm calculate the Probability of attribute value in nerual network by the way?
Hope my question is clear.
I am looking forward to hearing from you shortly and thanks a lot in advance.
With best regards,
Yours sincerely,
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Jul 26, 2007
How is the value of Prediction Probability calculated in the context of decision trees?
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Aug 19, 2007
Dear All,
In a data mining model with decision tree algorithm. For example I have the following train case table:
StudentID, IQ,EQ, IsPass.
I put all data in the table into the microsoft decision tree datamining model
StudentID is the key for datamining model
IsPass is prediction only data
IQ, EQ is the input.
1. How can I make a DMX selection to find out all NODE_UNIQUE_NAME with probability of IsPass >0.7.
2. How can I make a DMX selection to find out all the StudentID which belongs to the criteria defined by the Node?
Thanks and regards
Tony Chun Tung Siu
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Nov 13, 2007
We have 2 env. : Testing and Production, both are running Windows 2003 Enterprise Server with SQL Server 2005. The difference is Testing is NOT running Windows cluster but Production do so, what is the best way to transfer a database from testing to production?
We have another systems that both testing and production are running on NON-cluster and we use backup/restore to transfer the database, can it apply in this case.
And I found that there are a tools called DTC, which can transfer all DB objects from one DB to another, is it a best way to transfer between non-cluster and cluster env.?
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Jun 18, 2008
I have a stored proc. in that proc i need to select a value based on which one is greater.
Here is a non working example
select
name,
if (truck1.age > truck2.age, truck1.age, truck2.age)
from person
left join truck truck1
on truck1.make = person.make
left join truck truck2
on truck2.make = person.make
Thanks in advance for any help with this
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Aug 9, 2001
I'm trying to sniff or view a fairly large query that get's passed to my sql server.
The problem I'm having is that the dbcc inputbuffer only shows the first 255 chars of query and I need to see the whole thing.
Is there another method or a way to increase the size of this so I can see the whole query?
Thanks
- jeff
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Jul 24, 2007
Hi Guys
I have a table with id, date column in it. How do i list all records which has date greater than 30 day?
Thanks
Is this Correct?
SELECT * FROM TABLE WHERE DATEDIFF(DAY, DATE, GETDATE()) > 30
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Aug 29, 2013
I have a table which measures the changes in a feedback rating, measured by an integer. Most of my records are the same. Only the primary key & the timestamp change.
How do I query just the changes?
Example dataset:
idrating
15
25
35
45
56
66
[code]....
There are 20 rows & 5 changes. The query I want will result in just those that are different from the ones before them:
idrating
45
56
97
118
189
I use Microsoft SQL 2008
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Feb 6, 2008
I was comparing diffrent columns and within those columns there are specific values. I want to get the greter values using SQL 2000
i want something like these but i think there was an error in scripting
CASE
WHEN a > b,c,d,e THEN a
WHEN b > a,c,d,e THEN b
WHEN c > a,b,d,e THEN c
WHEN d > a,b,c,e THEN d
WHEN e > a,b,c,d THEN e
END
Please help. Is there any possible way to implement this? Thank you.
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Jun 1, 2000
Hello,
I would like to create a job that runs ones a day to delete records in a table that are older than one day. Any ideas?
Thanks,
Nina Melhem
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Mar 14, 2006
The length of my query string is greater than 255 characters. SQL Server is truncating the query string when I assign it to a Local variable.
What should i do....???
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Jan 10, 2006
Here is the first part of a query for MySQL that I am trying to get working on MSSQL:
Code:
SELECT n.*,
round((n.rgt-n.lft-1)/2,0) AS childs,
count(*)+(n.lft>1) AS level,
((min(p.rgt)-n.rgt-(n.lft>1))/2) > 0 AS lower,
(( (n.lft-max(p.lft)>1) )) AS upper
FROM table n
...
But, I get this error message:
Server: Msg 170, Level 15, State 1, Line 3
Line 3: Incorrect syntax near '>'.
Is there a way to convert this? Thanks
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Apr 21, 2015
I created this unique codes and I need all [FRMDAT] field set to "12/31/2014" in the MKLOPT table, where the [JOBCOD] in the VALUE list BELOW have a [FRMDAT] that is currently (greater than) > "12/31/2014"
VALUE LIST
PH00059
PH02775
PH03051
PH03305
PH03336
PH03342
PH03371
PH03992
PH03993
PH03994
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Jun 1, 2008
im supposed to output the companies that have commission rates highter than company "Industrial Appparatus".
is there some whay to modify this code so that it will work?
commissionrate > ALL(Select commissionRate From salescompanydomestic Where companyName = 'Industrial Appparatus')
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Sep 10, 2014
I have a query pulling all records with a disconnect date and a transaction date. However, I would like to retrieve any records that have a transaction date greater than 30 days from the disconnect date. I have been unable to figure out the correct formula to use. I think I need to use the datediff function in SQL, but I've never really used this function before.
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Mar 5, 2015
Problem: I want to set compatibility_level only when it is greater than 110.
Solution: Select the compatibility level and if it is greater than 110, I alter database set compatibility level=110
ISSUE Irrespective of IF Exist statement the alter database statement is executed all the time.
Here is the sql statement
IF EXISTS (
SELECT * FROM sys.databases where compatibility_level >110 AND name='mydatabase'
)
BEGIN
ALTER DATABASE mydatabase SET COMPATIBILITY_LEVEL = 110
END
What is that I am missing here ?
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May 29, 2007
Hello All,
Trying to set up a column in a grouped matrix that displays a count of all record over a specificed number.
The field I am counting are response time of transaction and I want to count how many were over 500 milliseconds. I though it would be something like this...
Code Snippet
=Count(Fields!ResponseTime.Value > "500")
However, this appears to just return the count of all rows and ignores the "500" part.
Am I missing something? If someone could post a alternate code snippet, that would be great.
Thanks in advance,
Clint
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Feb 27, 2008
I'm using and Execute Sql Task to get a count of the record in the table: How can I make the workflow to stop if it doesn;t meet the count requirement and continue if it does to the next flow. I'm looking at expression...but a bit comfused about using it.
thanks
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Apr 29, 2001
I have a column of varchar(2000) but when I use it in a select statement I only get the first 255 characters displayed. (all the data is there as I can see different parts using substring) How do I get the complete column to display?
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Sep 27, 2005
I think I'm trying to do a simple query on maximum date.
I've got 100 tools that have been used over the past three years.
Some of the tools are used almost every day. Other tools haven't been used for a month, while other tools haven't been used for a year or more.
Ultimately I'm trying to just find the list of tools whose latest date of use was a year ago.
I have a list of tools and a list of times each tool was used.
I think I'm going to have to do a search that for each tool what was the times it was used. That I can do.
What I'm not sure of is how to then pull only the latest date for each tool.
Once I get that I can then do a query off that result to pull the "oldest latest" date of use.
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Dec 19, 2013
finding the first value to cross a specific threshold in SQL Server
LoadTemp1 LoadTemp2 LoadTemp3 TimeStamp
300 350 200 12-10-2013 13:30
177 238 333 12-10-2013 13:05
240 190 170 12-10-2013 12:45
How do I design query to find the first LoadTemp* that cross a threshold of 340 degrees per TimeStamp.
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