Data Preprocessing Improvements

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Various data preprocessing improvements especially for data sets with many missing values. Furthermore this includes fixes for found defects in the data preprocessing components.

Defects

(1) Problem data generation fails with an Exception, if a user deletes one or more columns. (2) The generated classification problem data doesn´t keep the user defined positive class. (3) Editing a cell in the DataGrid-View leads to an Exception. (4) Exception if a user changes to the Histogram-View after he deletes a column (only occurs if the user was already in the Histogram-View before the deletion). (5) Manipulation-View: Wrong column count in the preview of "Delete Columns with insufficient Information" and "Delete Columns with insufficient Variance". (6) The Statistics-View doesn´t update the statistics if a Filter is applied to the data. (7) Deactive Export Problem Button. (8) Unexptected row delete behavior if the data is sorted (Datagrid-View). (9) An Exception occurs if the user deletes more than half of the rows in the DataGrid-View.

Features

(1) An option to display missing values within the Histogram view. (2) A possibility to delete columns in the DataGrid view. (3) Display Missing value information in the statistics available in the DataGrid view.

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r12051: Branched HL.DataPreprocessing to implement improvements

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r12052: created the HL.DataPreprocessing project subfolder in the DataPreprocessing branch

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r12053: moved the HL.DataPreprocessing project to the appropriate subfolder

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r12054: Branched HeuristicLab.DataPreprocessing.Views to implement the improvements

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r12056: Created a solution file and adjusted the project settings of the DataPreprocessing Branch

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r12058: Changed the logic of the ProblemDataCreator to avoid the access of a column that was deleted by the user before. Fixes Defect 1.

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r12062: Merged r12059 into branch.

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r12063: Added code to keep the user defined positive class in the generated problem data of a classification problem. (Defect 2 fix)

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r12158: Added a possibility to delete columns in the DataGrid view. (Feature 2)

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r12160: Branched HL.Data.Views to implement minor improvements to the StringConvertibleMatrixView-class.

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r12161: Adjusted the project settings of the DataPreprocessing Branch.

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r12164: Adjusted the project settings of the DataPreprocessing Branch.

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r12165: Encapsulated sort column and statistics generation behavior in StringConvertibleMatrixView.cs. Additionally fixed the statistic measures regarding missing values.

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r12167: Swapped column left- and rightclick behavior in the DataGrid view, to be consistent with the row selection behavior.

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r12168: Fixes a problem with r12167, in case only missing values are selected.

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r12169: Added an option to display the missing value count within the Histogram view. (Feature 1)

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r12500: Added code that fixes Defect 3 and prevents an endless loop.

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r12501: Adjusted the code of the Histogram-View to prevent an outdated CheckedItemList after the deletion of a column (Defect 4).

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r12502: Corrected the preview column count in the Manipulation-View (Defect 5) and added some additional information.

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r12543: The correct row will get deleted now if the data is sorted (Defect 8).

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r12544: Minor fix that activates the Export Problem Button (Defect 7).

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r12545: Added the recalculation of the Statistics-View if a Filter gets applied (Defect 6) and minor fixes to the statistic calculations.