Entities for Mining Models

Hallo,
I would like to Identify the Logical & Phyical Tables required for a specific Data Mining Model e.g. Churn Prediction. The "Oracle® Communications Data Model Reference 11g Release 2" Document lists "only" 5 Source Tables, Page 629 Chapter 10-9:
ocdm_sys.DWR_CUST
ocdm_sys.DWD_ACCT_STTSTC
ocdm_sys.DWR_BSNS_MO
ocdm_sys.DWR_HH
ocdm_sys.DWR_JB
Does this mean we only need to Source this 5 Tables for doing our Customer Churn Prediction?
Edited by: user639027 on 15.12.2011 12:27

Hi,
The OBE exercises show you both how to build models and then to apply (Score) new data using the built models.
A model is always built using some form of input data, so it is built specifically with that form of data in mind.
It is not a generic model at all.
When you apply a model you provide data in the same format as the original data.
In the case of a Classification or Regression model, you are applying the model to generate a prediction on new data that conforms with the build data provided to the model.
The online help provides details on all the models that are available.
Data Miner uses the data mining pl/sql packages (package name DBMS_DATA_MINING) to create and test models.
There are also sql data mining prediction functions as well.
Thanks, Mark

Similar Messages

Identify Entities for Logical Data Model

Hi,
I donno exactly this is the correct forum for this question. I believe there are database experts here to help me on this.
I am in confusion that, phsically the data can be saved in a set of tables (4-5 tables). But different views (User Interfaces) and reports can be created from these tables.
Assume that,
View1 - Uses all tables
View2 - uses only 3 tables
View3 - uses only 1 table
Report 1 - uses only 2 tables
Report 2 - uses only 4 tables
Should my Logical Data Model reflect all these view1, view2, view3, Reprt1 and Report2?
How exactly do we need to identify the entities for Logical Data Model?
Could you please any one help me on this?
Thanks & Regards
M Thiyagu

sorry, i couldnt understand your query..
thanks,
baskar.l

Unable to get Audit logs for Data Mining Model Oracle11g

Hi All, I followed all the steps given below 2 links but not getting any audit logs.
http://download.oracle.com/docs/cd/B28359_01/datamine.111/b28130/install_odm.htm#DMADM024
http://download.oracle.com/docs/cd/B28359_01/datamine.111/b28130/schemaobjs.htm#sthref233
Made sure the audit_trail is set to DB.
SQL cmds and its output shown below
SQL> AUDIT GRANT,AUDIT,COMMENT,RENAME,SELECT ON mining model NB_SH_Clas_sample;
Audit succeeded.
SQL> COMMENT ON MINING MODEL NB_SH_Clas_sample IS 'i am here';
COMMENT ON MINING MODEL NB_SH_Clas_sample IS 'i am here'
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 31648
Session ID: 135 Serial number: 114
SQL> quit
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Thanks in Advance

Hi.
Please take a look at the other concurrent thread on model object auditing for more detailed information. If you have Oracle support, please file a TAR with Metalink (http://metalink.oracle.com).
Regards, Peter.

Creating Entities for this data model

Hi guys,
I have these 3 tables:
create table employee_a
( employee_id int not null primary key ,
first_name varchar(50) not null ,
last_name varchar(50) not null )
create table manager_b
( id int not null primary key ,
manager_employee_id int not null foreign key references employee_a(employee_id) ,
subordinate_employee_id int not null foreign key references employee_a(employee_id) )
create table user_c
( user_id varchar(20) not null primary key ,
user_password varchar(100) not null ,
employee_id int null foreign key references employee_a(employee_id) )* All the employees are defined in employee_a table.
* If an employee is also a manager then its defined in manager_b table. That employee's id is defined in manager_employee_id column while his/her's subordinates employee ids are defined in subordinate_employee_id column.
* All the users of the system are defined in user_c table. If user of the system is also an employee then its defined in employee_id column of user_c table. If user of the system is not an employee then employee_id column is blank of user_c table.
The data may be like this:
insert into employee_a values (1, 'Mark', 'Benson')
insert into employee_a values (2, 'Joe', 'Young')
insert into employee_a values (3, 'Robert', 'Carbone')
insert into employee_a values (4, 'Wendy', 'Swistenenko')
insert into employee_a values (5, 'Tony', 'Lapolla')
-- Joe Young is manager of "Robert Carbone" and "Tony Lapolla"
insert into manager_b values (100, 2, 3)
insert into manager_b values (101, 2, 5)
-- Wendy Swistenenko is manager of "Mark Benson"
insert into manager_b values (102, 4, 1)
-- Users of the system who are also employees
insert into user_c values ('bensonM', 'password', 1)
insert into user_c values ('youngJ', 'test', 2)
-- A user of the system who is not an employee
insert into user_c values ('guest', 'pretty', null)My question is how to define Entities for these 3 tables for JPA. I am concerned about Inheritence Strategy to use.
Thanks

sorry, i couldnt understand your query..
thanks,
baskar.l

Mining Models used in SQL Developer 3.0 and models created PL/SQL scripts

Hi,
Pardon my ignorance if some of my questions are very basic. I am just gaining understanding about building/using mining models.
I installed sql developer and went thru some OBE exercises to build models ( classification models)
While building workflows the exercise required to supply data for the pre built models ( the four models pre-created). The question is - is this exercise is about building models or using models ?
How those pre-built models were created? Are these models are restricted in their usage. or are they generic models that they can be applied for solving similar problems?
What type of models can be used in workflows?
I am also seeing some smaples of pl/sql scripts used in creating some models. Is it correect to assume they are created using PL/SQL APIs ( DBMS_DATA_MINING, DBMS_DATA_MINING_TRANSFORM etc).
What is the differrence between these two model building process ?
Thanks

Hi,
The OBE exercises show you both how to build models and then to apply (Score) new data using the built models.
A model is always built using some form of input data, so it is built specifically with that form of data in mind.
It is not a generic model at all.
When you apply a model you provide data in the same format as the original data.
In the case of a Classification or Regression model, you are applying the model to generate a prediction on new data that conforms with the build data provided to the model.
The online help provides details on all the models that are available.
Data Miner uses the data mining pl/sql packages (package name DBMS_DATA_MINING) to create and test models.
There are also sql data mining prediction functions as well.
Thanks, Mark

How to add new past in mining model and how to update the previous data in the minin model of time series algorithm?

hello,
I creata a mining model and trained it with some data using the sql table.Now I want that when ever I make any Changes in sqltable record. Then I have to chane the data of mining model also.Please provide help.
Thanks in Advance
Shalini Rathore

Hi, thanks for the reply!
Just to follow up for what we did to disable the delete function for maintaining table records. We hided the Delete button by adding a "MODULE disable_delete" code in Screen Painter. So now only adding records to the table is allowed.
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Jenny

Sequences Mining Model

Hi,
I would like to know how to get a list a each sequence, his support from a sequence mining model with a DMX query.
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A B C; 15
B D C; 30
Thanks
Best regards
Ludo

This idea might not be possible: the sequence clusters are a group of items, and therefore the support will vary. In other words, different support (in your first row) for A versus B versus C.
See query examples at
http://msdn.microsoft.com/en-us/library/cc645869(v=sql.120).aspx
Mark Tabladillo PhD (MVP, SAS Expert; MCT, MCITP, MCAD .NET) http://www.marktab.net

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Painting a dress from scratch is most difficult, unless you are an artist with a lot of experience.
The much easier way is to search for a photograph of a dress you like, then cut and paste it to the new photo. The key here is to have both pictues with the same light angle so the shadows are in the right spot.
Once you get it pasted, click Ctrl T then size and rotate it. The next stop is to use edit/warp to reshape dress to fit model. You can fine tune it with puppet warp.
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Thanks in advance.

Mavericks is no longer available from the App Store, so your choice is Yosemite. One option is to create a new partition (~30- 50 GB), install the new OS, and ‘test drive’ it. If you like/don’t like it it, you can then remove the partition. Do a backup before you do anything. By doing this, if you don’t like it you won't have to go though the revert process.
Check to make sure your applications are compatible.
Application Compatibility
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Transforming to HTML and problems with incorrect entities for quotes

Hello,
I have a seemingly fairly simple problem, I have a DOM tree which I would like to convert to HTML.
This works fine, also for special characters like umlauts - they are escaped with the correct html entities.
However single and double quotes are not escaped at all. Do I need to define custom entities for that?
Sample code:
package generaltests;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import java.io.*;
public class XmlTransform {
public static void main(String args[]) {
try {
DocumentBuilderFactory dbfac =
DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = dbfac.newDocumentBuilder();
Document doc = docBuilder.newDocument();
//<QBXML>
Element root = doc.createElement("ROOT");
doc.appendChild(root);
Element text = doc.createElement("TEXT");
root.appendChild(text);
text.appendChild(doc.createTextNode("Test text\n< With special character ' and umlaut �"));
// Transformation
TransformerFactory transfac = TransformerFactory.newInstance();
Transformer trans = transfac.newTransformer();
trans.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
trans.setOutputProperty(OutputKeys.METHOD, "html");
trans.setOutputProperty(OutputKeys.ENCODING, "US-ASCII");
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StreamResult result = new StreamResult(sw);
DOMSource source = new DOMSource(doc);
trans.transform(source, result);
System.out.println(sw.toString());
} catch (Exception e) {
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<ROOT><TEXT>Test text
< With special character ' and umlaut ö</TEXT></ROOT>Edited by: tzu22 on Apr 16, 2008 1:44 AM
Edited by: tzu22 on Apr 16, 2008 1:50 AM

& quot; and & apos; have to be used for attribute values. For text nodes, " and ' can be used as ordinary characters.
Edited by: Alain_COUTHURES on Apr 16, 2008 8:32 AM

HP Pavilion DV2700 Special Edition what is the max ram for this model laptop?

HP Pavilion DV2700 VERVE Special Edition
Operating System Windows Vista 64 bit Service Pack 2
Year made 2007
Processor AMD Turion 64 X2 TL- 60 2.0 GHz
Current Ram 4GB
would like to know what is the max ram
PS
Can i install and other Processor or is this and intergrated one with the motherboard.?
In Advance thank you for your time to look at my question
Indarktimes
This question was solved.
View Solution.

Hi
Please find the link given below for your model off unit Max Memory supported is 4GB.
http://h10010.www1.hp.com/wwpc/ca/en/ho/WF06a/12139188-78299199-78299212-78299212-78299212-81135202....
Let us know how it goes!
"I work for HP."
****Click the (purple thumbs up icon in the lower right corner of a post) to say thanks****
****Please mark Accept As Solution if it solves your problem****
Regards
Manjunath

HT4623 My old school iPod touch won't update. Does apple mess it's customers over by not allowing updates for older models of the touch? My last update is Ios5. My touch says its up to date. So has my old school touch reached its pinnacle?

My old school iPod touch won't update. Does apple mess it's customers over by not allowing updates for older models of the touch? My last update is Ios5. My touch says its up to date. So has my old school touch reached its pinnacle?

Correct. The 3G iPod does not have the hardware to support an iOS version higher than 5.1.1
To more easily find compatible apps:
iOSSearch - search the iTunes store for compatible apps.
Apple Club - filter apps by iOS version.
Starting when iOS 7 was releases, Apple now allows downloading the last compatible version of some apps (iOS 4.2.1 and later only)
App Store: Downloading Older Versions of Apps on iOS - Apple Club
App Store: Install the latest compatible version of an app
You first have to download the non-compatible version on your computer. Then when you try to purchase the version on your iPod you will be offered a compatible version if one exists.

Windows 8.1 Pro Bluescreen on Asus K53SC I bought on Amazon for 3D Modeling.

I got this Asus K53SC with an Intel Core i5 and a dedicated GeForce 520MX with Optimus. New Hard Drive with Fresh Windows 8.1 Pro Install. The problem is that even with Windows 7 Professional it would give me a Blue screen. I downloaded a Blue screen Viewer
and got this info from the dmp. Any help since I don't want to mess around opening it just to make sure it is a hardware issue, Thanks in advance.
==================================================
Dump File         : 052114-22203-01.dmp
Crash Time        : 5/21/2014 7:14:23 AM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c000001d
Parameter 2       : fffff800`7d78d207
Parameter 3       : ffffd000`4710c2c0
Parameter 4       : 0000000d`0f2ba272
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2207
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\052114-22203-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 294,088
Dump File Time    : 5/21/2014 7:15:36 AM
==================================================
==================================================
Dump File         : 052114-40250-01.dmp
Crash Time        : 5/21/2014 7:06:30 AM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c000001d
Parameter 2       : fffff801`e9dbd207
Parameter 3       : ffffd000`5e7b22c0
Parameter 4       : 000001e1`1a75320b
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2207
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\052114-40250-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 297,696
Dump File Time    : 5/21/2014 7:11:31 AM
==================================================
==================================================
Dump File         : 052114-32203-01.dmp
Crash Time        : 5/21/2014 5:56:58 AM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c000001d
Parameter 2       : fffff800`5dfae207
Parameter 3       : ffffd001`dd10c2c0
Parameter 4       : 00000372`923eee4d
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2207
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\052114-32203-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 303,168
Dump File Time    : 5/21/2014 6:23:56 AM
==================================================
==================================================
Dump File         : 052114-22468-01.dmp
Crash Time        : 5/21/2014 3:29:55 AM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c0000096
Parameter 2       : fffff801`16dcd240
Parameter 3       : 00000000`00000000
Parameter 4       : 00000000`00000000
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2240
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\052114-22468-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 286,752
Dump File Time    : 5/21/2014 3:31:48 AM
==================================================
==================================================
Dump File         : 052114-25531-01.dmp
Crash Time        : 5/21/2014 12:02:04 AM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c000001d
Parameter 2       : fffff800`b99a1207
Parameter 3       : fffff802`49561a00
Parameter 4       : 00000041`21c68e88
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2207
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\052114-25531-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 286,808
Dump File Time    : 5/21/2014 12:03:04 AM
==================================================
==================================================
Dump File         : 052014-36562-01.dmp
Crash Time        : 5/20/2014 11:32:21 PM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c000001d
Parameter 2       : fffff800`f2b69207
Parameter 3       : ffffd001`c39b22c0
Parameter 4       : 00000218`cca47f3e
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2207
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\052014-36562-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 298,872
Dump File Time    : 5/20/2014 11:34:00 PM
==================================================
==================================================
Dump File         : 052014-28484-01.dmp
Crash Time        : 5/20/2014 9:46:02 PM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c000001d
Parameter 2       : fffff800`52e8a207
Parameter 3       : fffff800`24f53a00
Parameter 4       : 00000007`b9324414
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2207
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\052014-28484-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 295,416
Dump File Time    : 5/20/2014 9:47:20 PM
==================================================
==================================================
Dump File         : 051814-82281-01.dmp
Crash Time        : 5/18/2014 11:14:03 AM
Bug Check String :
Bug Check Code    : 0x00020001
Parameter 1       : 00000000`00000011
Parameter 2       : 00000000`0026b139
Parameter 3       : 00000000`00001003
Parameter 4       : ffffe800`05220de0
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+153fa0
File Description : NT Kernel & System
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.17041 (winblue_gdr.140305-1710)
Processor         : x64
Crash Address     : ntoskrnl.exe+153fa0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\051814-82281-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 324,352
Dump File Time    : 5/18/2014 11:24:45 AM
==================================================
==================================================
Dump File         : 050714-28531-01.dmp
Crash Time        : 5/7/2014 6:54:15 PM
Bug Check String : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c000001d
Parameter 2       : fffff800`029ad207
Parameter 3       : ffffd000`201fb240
Parameter 4       : 00000029`e1993ac5
Caused By Driver : intelppm.sys
Caused By Address : intelppm.sys+2207
File Description : Processor Device Driver
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.3.9600.16384 (winblue_rtm.130821-1623)
Processor         : x64
Crash Address     : ntoskrnl.exe+14dca0
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\050714-28531-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 9600
Dump File Size    : 282,376
Dump File Time    : 5/7/2014 6:55:19 PM
==================================================

intelppm.sys is intel processor driver or chipset driver
I suggest go to intel site and autodetect if there is updated driver for your PC
but its seems odd, when I check at Asus site, there is no specific driver for Windows 8.1 for this model. I suggest you contact Asus as well regarding this Windows 8.1 installed in your PC
tips: don't use more than 1 antivirus, MSE good enough for Windows8.1
       remove or disable temporary tools like deamon tools or any HDD virtualization

Lenovo G50-45 why is no USB 3.0 driver listed for this model

I started a clean boot of Windows 7 x64 from USB as I'm not a fan of Windows 8 but since installing I've been unable to get the USB 3.0 port to recognize anything I plug in (was working fine before).
I can't see a USB 3.0 driver listed on the support page for this model:
https://support.lenovo.com/us/en/products/laptops-and-netbooks/lenovo-g-series-laptops/g50-45-notebo...
I've also read similar problems have occured on other manufacturers laptops and this was fixed by installing the chipset drivers etc in the correct order.
Is there a correct order I should adhere to?
Any help much appreciated

I am having the exact same issue on my 2013 MBPr.
I have two Seagate GoFlex USB 3.0s, one plugged into the regular 3.0 port (450MB/s) on the left and the other plugged into the high-speed (5GB/s) 3.0 port on the right. When doing a simple copy/paste from the one drive to the other, I observe the following speeds:
Peak Read (USB 3.0): 36.2Mb/s (288Mbit/s)
Peak Write (USB-HS 3.0): 48.7Mb/s (384Mbit/s)
This is far below the 620MB/s for 3.0 and is more around the 35MB/s USB 2.0 standard.
So, I'm likely to agree with the original compaintant that the 3.0 standards aren't being employed by the MacOSX USB drivers and I'd hope to see a fix soon for these issues lest people start moving off of the Mac platforms to other vendors who adhere to industry guidelines.

Can Adobe Photoshop CS4 be used for 3d modeling?

hello, I know Adobe Photoshop Extended can be used for 3d modeling but can just the normal Adobe Photoshop CS4 be used in the same way because i dont feel like buying it for $1000 but I need Photoshop for my 3d models for texturing. So can the normal Photoshop be used the same way as the Extended can and will not make a difference? Thanks
Stephen

I know Adobe Photoshop Extended can be used for 3d modeling
No - it can't do 3d modelling - what it can do is 3D rendering, to some extent. Photoshop CS4 extended only has primitives (cubes, rhombus etc) and these are not editable. So full 3d rendering is not possible. You have to load in models created in other software,
Extended's 3D capabilities are in the process of development - meaning that they decided to INTRODUCE it into CS3 and 4, but its far from the finished article. Both in terms of interface and capabilities. Now the rendering, animation capabilities, and ease of use is better than most people realise - but it sill has efficiency, and design problems, which need to be reassessed. Its more like BETA2 than finished product.

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