VisiRex 2.1 for Windows
- VisiRex is based on a highly optimized version of the C4.5 algorithm published by J. Ross Quinlan.
- VisiRex is a 32 bit program which requires Windows 95, 98, ME, 2000 or Windows NT4(sp3).
- For detailed information about using VisRex, please refer to the VisiRex Help File.
- Data must be in a table contained within an Access 97 MDB file, up to one gigabyte in size.
- VisiRex Import function converts any comma separated (CSV) text file to MDB format.
- VisiRex only reads your data file. Your data is never modified in any way.
- VisiRex can link to most common databases if you have their ODBC drivers installed.
- Data may contain 2 to 250 fields and any number of records.
- One data field must be set as primary key index.
- Fields may be bit, byte, integer, floating point, date or text type.
- Text fields selected for use by VisiRex may have up to 256 unique values.
- Ease of use has been the ultimate goal in designing VisiRex.
- Data may be imported from ASCII text files.
- You may select which fields are to be used by VisiRex rule extraction.
- You may select whether numeric fields are used as continuous values or discreet classes.
- You may select which rows are used for training the rule extraction, and which rows are to used for later testing.
- Several VisiRex projects may share the same source database.
- Rows containing missing values will automatically be detected and handled.
- Extracted rules may be viewed in either flow chart format or tree format.
- Extracted rules may be interactively pruned using a combination of two pruning algorithms.
- Flow chart nodes may be color coded to indicate data volume, prediction confidence, or prediction trend.
- Every point on the flow chart reports data volume and prediction confidence.
- Flow charts may be tiled to your printer, or exported to Visio ®.
- Comprehensive statisical reports are automatically compiled for your database.
- Confusion matrix shows actual versus predicted for all classes.
- Data may be subdivided, then browsed and exported according to position on the flow chart or confusion matrix.
- Data browsing allows multiple sorting, text finding, and checkmark setting.
- Checkmarked rows may be exported as a new MDB database or as ASCII CSV files.
- Live predictions can be made, enabling you to interactively experiment with field values.
- Context sensitive help file responds to your F1 key.
- These amazing speeds were achieved on a stand-alone 400 Mhz Pentium II computer using 128 Mb Ram and IDE hard drive.
- The Cancer database contains 458 rows of data. Using 9 numeric input fields a rule tree consisting of 45 nodes was extracted in 1 second.
- The Mushroom database contains 8,124 rows of data. The data took 17 seconds to initially load into VisiRex. Using 22 text input fields a rule tree consisting of 29 nodes was extracted in 1 second. Testing this tree for all rows required 15 seconds.
- The States database contains 28,052 rows of data. The data took 5 seconds to initially load into VisiRex. Using 2 numeric input fields, a rule tree consisting of 225 nodes was extracted in 4 seconds.
A unpruned tree consisting of 1,429 nodes was extracted in 6 seconds. Testing this 1,429 node tree tree for all rows required 11 seconds.
- A manufactured database contains 1 million rows of data. The collection of data statistics at project creation took 10.5 minutes.
The data took 6 minutes to initially load into VisiRex. Using 4 text fields plus 2 numeric fields, a rule tree consisting of 17 nodes was extracted in 18 seconds.
Testing this tree for all million rows required 11 minutes.