Building a Recommendation Engine: The XELOPES Library - Realtime Data Mining - page 244

Management Warehouse Process Warehouse Operation

Transformation OLAP Data

Mining

Business
Nomenclature

Information
Visualization

Analysis

Resource Relational Record Multidimensional XML

Business
Information

Data
Types

Software
Deployment

Key
Indexes

Expres
sions

Type
Mapping

Foundation

Object Core Behavioral Relationships Instance

Fig. 12.7 CWM packages used in MiningInputStream

Table 12.1 Important resource streams
Resource stream Super class Description

MiningArrayStream MiningInputStream Access to data stored in array

MiningStoredData MiningInputStream Access to data stored in vector

MiningIteratorStream MiningInputStream Access to iterator objects

MiningSqlStream MiningInputStream Access to data stored in database

MiningFileStream MiningInputStream Access to data stored in a file

MiningCsvStream MiningFileStream Access to data in CSV file

MiningExcelStream MiningFileStream Access to data in Excel file

LogFileStream MiningFileStream Access to data in web server log file

MiningFilterStream MiningInputStream Access to transformed stream

MultidimensionalStream MiningInputStream Access to multidimensional stream

MultidimensionalSqlStream MultidimensionalStream Access to multidimens. SQL stream

Example 12.6 Example of access to a CSV file using the corresponding mining
input stream:

// Open CSV file 'iris.dat':
MiningCsvStream inputStream ¼ new MiningCsvStream("csv/
iris.dat");
inputStream.open();

// Get metadata of Iris:
MiningDataSpecification metaData ¼ inputStream.getMetaData();

// Read all data vectors of Iris:
while( inputStream.next() ) {
MiningVector mv ¼ inputStream.read();
// ...//

}

inputStream.close(); ■