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Fields, Methods

See also:

DecisionTree, DecTreeDataBuild, DecTreeDataClassify, DecTreeProperties, DecTreeData, StepInfo, ID3, StepInfo, CART

Appears in:

Algorithm classes

Connections

Association link to class [Tree classes].DecisionTree     Association link to class [Main classes].DecTreeDataBuild     Association link to class [Main classes].DecTreeDataClassify     Association link to class [Main classes].DecTreeProperties     Association link to class [Main classes].DecTreeData     Association link to class [Algorithm classes].StepInfo     Generalization link from class [Algorithm classes].ID3     Association link from class [Algorithm classes].StepInfo     Generalization link from class [Algorithm classes].CART

DecTreeMethod Attributes

Attribute Details public Form   Properties public Form   Window Notes: Parent window - due to owner for error messages. public DecisionTree   Tree Notes: The decision tree to use. public DecTreeDataBuild   DataBuild Notes: The data for build properties. public DecTreeDataClassify   DataClassify Notes: The data for build properties. public DecTreeProperties   GeneralProperties Notes: General properties for methods. public ProgressBar   MethodProgressBar Notes: Progress bar to show the algorithm progress. public int   TransformId Notes: ID of this method - from the main application. protected DecTreeData   Data Notes: It is DataClassify or DataBuild according to a context. protected ArrayList   ResultClasses Notes: List of all the result classes in data. It is used when working. private bool   noStep Initial: false Notes: If user canceled the stepping. private bool   abortedProcess Initial: false Notes: If user aborted all the process. private StepInfo   StepInfoWindow Initial: null Notes: Window for stepping information protected DataSrc   dsrc Notes: Working DataSrc ( = table) protected OdbcCommand   command Notes: ODBC command for the run the query over the data table. protected int   MaxNode Notes: MaxNode + 1 is the first not used number of node.

DecTreeMethod Methods

Operation Details public abstract DescribeMethod():string Sequential Notes: Get a description for a method instance, for its options etc. Used by stepping. public Build():int Sequential Notes: Main function for building the decision tree. @returns negative if error, zero if succes protected abstract BuildSpecific():int Sequential Notes: Main function for building the decision tree, specific according to a current method. @returns negative if error, zero if succes protected abstract CompareSplitters(    int node,    DecTreeSplitter splitter1,    DecTreeSplitter splitter2):int Sequential Notes: Compares two splitters which is better. @returns 1 if splitter1 is better than splitter2, 0 if it is equivalent, -1 else protected abstract GetSplitters(    int node):ArrayList Sequential Notes: Returns ArrayList of Spitter class - all available splitters in node. @returns protected EndCondition(    int node):bool Sequential Notes: Condition for ending of algorithm - if returns true, actual node will be a leaf. For most algorithm is good this general method of EndCondition. @returns public Classify(    String newVersionName):int Sequential Notes: Classify the data according to the Tree. For all methods (descendants) the same code. protected ClassifyRecursive(    int node,    DecisionTreeNode actualNode):void Sequential Notes: Recursive kernel of the classification algorithm. protected SetResultClass(    int node,    object resultClass):void Sequential Notes: Set the class of node. protected GetNodeClass(    int node,    double prob):object Sequential Notes: Returns the biggest class in the node. If there are more ones, returns one of them. @returns protected Split(    int node,    DecTreeSplitter splitter):ArrayList Sequential Notes: Splits the data according a splitter. Returns ArrayList of nodes (int). @returns protected BuildRecursive(    int node,    DecisionTreeNode actualNode,    int depth):void Sequential Notes: The "kernel" of the decision tree algorithms. protected BestSplit(    DecisionTreeNode actualNode,    int depth,    int node,    DecTreeSplitter BestSplitter):ArrayList Sequential Notes: Makes a best split of node. @returns ArrayList of subnodes and the BestSplitter protected GetNodeWhere(    int node):string Sequential Notes: Gets SQL WHERE clause for the node. @returns SQL WHERE clause for the node protected MakeSubNode(    int node,    string where):int Sequential Notes: Makes a subnode of node according to a where clause. @returns number of the new node protected GetCount(    int node):int Sequential Notes: Returns the number of data rows in the node. @returns protected GetCount(    int node,    string where):int Sequential Notes: Returns the number of data rows in the node, where "where". @returns protected GetCount(    int node,    string where,    string colname,    object colvalue):int Sequential Notes: Returns the number of data rows in the node, where "where" and where colname == colvalue. @returns protected Prob(    int node,    object classvalue):double Sequential Notes: Returns a probability of class (classvalue) in the node. @returns protected Prob(    int node,    string where,    object classvalue):double Sequential Notes: Returns a probability of class (classvalue) in the node, where "where". @returns protected GetColumnValues(    int node,    string colname):ArrayList Sequential Notes: Gets a list of all values in column in node. @returns protected GetNumericalBreakPoints(    int node,    string colname):ArrayList Sequential Notes: Gets a list of numerical values (breakpoints) that divides a data to class groups. @returns protected FillResultClasses(    int node):void Sequential Notes: Fills the ArrayList ResultClasses of all the result classes in node. protected InitRootNode(    int node):void Sequential Notes: Marks every row as the member of node. protected AddColumn(    string colname,    string coltype):void Sequential Notes: Adds a column to a table specificated in Data.Table. If this column already exists, drops it before - due to types problem. protected DropColumn(    string colname):void Sequential Notes: Drops a column in a table specificated in Data.Table. protected ExistsColumn(    string colname):bool Sequential Notes: Return if exists the colname in Data.Table. @returns public GetDBString(    string colname,    object o):String Sequential Notes: Returns string of o suitable for DB query. @returns protected GetScalarDB(    string query):object Sequential Notes: Encapsulation for SQL query. @returns protected GetReaderDB(    string query):OdbcDataReader Sequential Notes: Encapsulation for SQL query. @returns protected ExecuteDB(    string query):int Sequential Notes: Encapsulation for SQL query. @returns

class: DecTreeMethod