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Ticket Resolution Summary Owner Reporter
#3099 done Crossvalidation meta-alg ignores estimation limits from embedded symbolic regression problem mkommend gkronber
#3095 done Non-linear regression does not support power function gkronber gkronber
Description

In the interpreter for SymReg GP we round powers to the closest integer. Models where this kind of rounding is necessary cannot be handled by autodiff. Therefore, we disabled parameter optimization for all models with power symbols.

However, exponentiation with integer powers could be handled easily in autodiff code for parameter optimization by fixing the power. This would be convenient for NLR because polynomials could be input directly instead of rewriting them to via cube(), sqr(), and products.

Backwards compatibility: For SymReg GP it was not possible so far to use the power symbol in combination with parameter optimization (exception). If we change the parameter optimization code to fail when encountering a non-integer power then the code will still fail because this will naturally occur for GP trees.

#3094 done Exception in CrossValidationView mkommend gkronber
Description
************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
   at HeuristicLab.Algorithms.DataAnalysis.Views.CrossValidationView.shuffleSamplesCheckBox_CheckedChanged(Object sender, EventArgs e) in C:\reps\hl-core\trunk\HeuristicLab.Algorithms.DataAnalysis.Views\3.4\CrossValidationView.cs:line 204
   at System.Windows.Forms.CheckBox.OnCheckedChanged(EventArgs e)
   at System.Windows.Forms.CheckBox.set_CheckState(CheckState value)
   at System.Windows.Forms.CheckBox.set_Checked(Boolean value)
   at HeuristicLab.Algorithms.DataAnalysis.Views.CrossValidationView.OnContentChanged() in C:\reps\hl-core\trunk\HeuristicLab.Algorithms.DataAnalysis.Views\3.4\CrossValidationView.cs:line 63
   at HeuristicLab.MainForm.WindowsForms.ContentView.set_Content(IContent value) in C:\reps\hl-core\trunk\HeuristicLab.MainForm.WindowsForms\3.3\Views\ContentView.cs:line 51
   at HeuristicLab.MainForm.WindowsForms.ViewHost.set_ActiveView(IContentView value) in C:\reps\hl-core\trunk\HeuristicLab.MainForm.WindowsForms\3.3\Controls\ViewHost.cs:line 79
   at HeuristicLab.MainForm.WindowsForms.ViewHost.OnViewTypeChanged() in C:\reps\hl-core\trunk\HeuristicLab.MainForm.WindowsForms\3.3\Controls\ViewHost.cs:line 181
   at HeuristicLab.MainForm.WindowsForms.ViewHost.set_ViewType(Type value) in C:\reps\hl-core\trunk\HeuristicLab.MainForm.WindowsForms\3.3\Controls\ViewHost.cs:line 127
   at HeuristicLab.MainForm.WindowsForms.ViewHost.OnContentChanged() in C:\reps\hl-core\trunk\HeuristicLab.MainForm.WindowsForms\3.3\Controls\ViewHost.cs:line 145
   at HeuristicLab.MainForm.WindowsForms.ContentView.set_Content(IContent value) in C:\reps\hl-core\trunk\HeuristicLab.MainForm.WindowsForms\3.3\Views\ContentView.cs:line 51
   at HeuristicLab.Optimization.Views.ExperimentTreeView.treeview_NodeMouseClick(Object sender, TreeNodeMouseClickEventArgs e) in C:\reps\hl-core\trunk\HeuristicLab.Optimization.Views\3.3\ExperimentTreeView.cs:line 601
   at System.Windows.Forms.TreeView.OnNodeMouseClick(TreeNodeMouseClickEventArgs e)
   at System.Windows.Forms.TreeView.WmNotify(Message& m)
   at System.Windows.Forms.TreeView.WndProc(Message& m)
   at HeuristicLab.Optimization.Views.ExperimentTreeView.CustomTreeView.WndProc(Message& m) in C:\reps\hl-core\trunk\HeuristicLab.Optimization.Views\3.3\ExperimentTreeView.cs:line 914
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
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