Renewed GUI: Toolbars, Data Manager tab and Model browser.

Save charts as images (bitmaps - PNG and vectors - EMF), zoom out, switch to full-screen - now within the context menu (right-click) for all charts.

Date/time variable now can be analyzed using country-specific Holiday calendars.

Support for datasets with future data. (For example you have weather forecast or a schedule for data points you wish to forecast. Thus, these columns will be longer than the others.)

Two new options for learning window size in the time series preprocess panel.

Improved Confusion matrix analysis.

A fallback visualization style for large datasets plotting.

Fixed: 'Correlation with target' crashes the application.

Other small GUI improvements and bug-fixes.

Number of stored models in the Solver module is splitted into separate settings for Neural-type and Combinatorial core algorithms.

Fixed: Plot tab doesn't take original plot position and size when a new simulation result is ready.

Fixed: Compatibility with AVG antivirus.

Up to 6x faster task processing thanks to changing compiler to GCC.

One-vs-all classification template and example.

Confusion matrix.

Model browser now allows to view either postprocessed simulation results or raw models.

Export of postprocessed predictions.

New style of charts and plots with interactive hints for visualized data points.

Various small improvements in the GUI.

Fixed: Holding-out missing values of the target column did not work correctly without at least one actually missing value.

GMDH Shell Free Edition now allows activation of a 7-day fully functional Professional Edition trial.

Import module now recognizes Date/Time columns in various formats that makes possible extraction of the following numeric variables: year, month, day of week, day of month, hour, minute, second. In most cases you should then decompose the extracted variables to binary variables using the corresponding operator from the panel 'Transformations'.

Some GUI improvements for the 'obsolete data detection' feature. The feature helps to ensure that time series data imported from several different files have the same timestamp in the last row.

Now many of error messages contain suggestions on how to resolve them.

Various small changes and enchantments in the user interface.

Fixed: Inability to apply models if numeric columns of a dataset were decomposed.

Fixed: Repeated processing of the same project caused an error during model plotting.

Various minor bug-fixes.

Fixed: Neural-type algorithm did not work with one input variable.

Fixed: Import module generates unnecessary debug information while it works with XLS files.

Fixed: Row IDs can't be used as plot labels.

Added a new 'Hold-out' parameter called 'missing values' that allows to hold-out and predict automatically all missing values of the target variable. In the previous versions of GMDH Shell this feature was always turned-on that resulted in significant workflow limitations.

Fixed: Plot tab visualization failure after clicking at 'Apply model' button.

The Import module can now transpose the data files that store variables in rows - into the columns. (Since GMDH Shell works only with variables in columns).

Fixed: Processing could not be started while the dataset is opened by other applications (such as Excel, Notepad, etc.).

Fixed: The data preprocessing parameters could not be set from the command line.

The new Import dialog with preview.

Reorganized time series preprocessor panel.

Multi-period time series simulations.

More consistent use of identifiers (IDs) for visualization.

Faster rendering of charts, and it no longer requires OpenGL.

Improved Table panel in Simulation results.

Smaller model files, faster loading of saved simulations. The old model files are no longer compatible.

Different types of parallelism in the case of a large number of small simulations.

Many small bug-fixes.

Minor changes in the user interface.

Solver: Improved quality of Neural-type models. Elite selection of neurons was replaced by bi-criteria selection composed of testing error minimization and population diversity maximization. Repeated processing of any project now often produce slightly different models depending on how parallel tasks were distributed across CPU cores.

Solver: Estimation of model coefficients using Robust regression (locked to MAE selection criterion).

File explorer: Pie chart, 3D Bubbles (OpenGL required), expanded Statistics table.

Preprocessor: Handling of spikes.

Preprocessor: Generation of lags with certain step. For example, preprocessor command VarName@0-30:12 means generation of lags with step 12 (only two lags will be generated within the interval 0-30).

New command line keys for batch-mode execution.

Improved standard templates.

Minor changes in user interface.

New export plug-in for batch-mode exporting of postprocessed predictions.

Minor changes in user interface.

Minor bug-fixes.

2x faster processing thanks to low-level code optimization.

Fixed: Model averaging control was blocked.

Fixed: Program registration fails on some computers.

Minor changes in user interface.

New: Statistics, Correlogram and Pair-wise correlations in Data manager tab.

Much faster processing. Read more...

Estimation of remaining processing time in case of a single simulation.

Changes in dialogs: Load example, Save as template, Save as example.

Fixed: Failure to perform the sequence Load simulation > Apply model > Export current model values.

Fixed: Weighting of instances doesn't work when neural-type core algorithm is selected.

New: Contour plot, Heat map and 3D Surface in the File explorer of Data manager.

New: Support for XLSX files.

New: Tabs are groped by plug-in modules.

New: Residual plot in the tab Simulation results.

New: License policy allows activation of GMDH Shell 2.0 Professional edition on two computers and 4 months after the last activation the process can be repeated on a new or upgraded computer.

Restored multi-core CPU support for Neural-type core algorithm.

Fixed: Failure to export some formulas that was loaded using Load simulation button.

Minor changes in user interface.

Fixed: Failure to export formulas in the case of a small number of variables.

Fixed: Unreadable XLS files led to a crash, for example, password protected XLS.

Fixed: Administrative access is required to run an installed copy of GMDH Shell.

Now GMDH Shell always propose to store user-created Templates and Examples in a folder with guaranteed user-level access.

Minor GUI improvements.

Improved Data manager panel:

Bar chart, Histogram, Colored scatter plot.

Splitter between input and target variable panels, splitter between File explorer and other panels.

New transformations: Decompose particular column, Weighted instances.

Reorganized panel of user-defined transformations.

Simplified time series preprocessor configuration.

Export of model predictions to XLS now works similar to the formula export.

Fixed: Inability to import XLS if any XLSX files are in the same directory. Usually indicated with the error message “quote in unquoted text”.

Fixed: Inability to import XLS files with blank rows on the top.

Minor changes in user interface.

Fixed: Cube root transformation leads to incorrect formula export.

Minor changes in user interface.

Unicode (UTF-8) data files are fully supported now.

Fixed: Inability to apply model from a save-file before the start button was pressed at least once.

Minor changes in user interface.

Export of models to XLS now uses model labels composed from Model rank and Target name.

Fixed: Generation of model formula fails in certain conditions and makes Export of models to XLS unavailable.

Fixed: Stopped simulation can cause visualization problems.

Fixed: Application crashes when 'Preview as plot' is switched on in the Data manager and a new data file is opened using the Import button.

Fixed: Data manager is unable to create configuration file prepro.txt if for any reason the file was removed from the project directory.

Updated template descriptions.

Model performance panel was expanded with new sections.

Fixed: Data manager now correctly plots data columns in the File preview area by left-button mouse double-click.

Minor improvements.

Neural-type algorithm is renewed, now it supports save/load/apply of models, more user-defined parameters, export to XLS, and all visualization techniques.

New export menu option: Export preprocessed data to XLS.

Data transformations with root and cube root functions are now consistent in GMDH Shell and Excel.

Square root and logarithm transformations are redefined in order to accept negative values.

Data manager shows more information about operators including plot and formula.

Tabs and panels can be organized as different layouts in the View section of program menu.

Plotting of numerical variables in the File preview section of Data manager.

Fixed bug: Save of a simulation didn't work after model application.

Minor improvements.

Export formula to Excel.

Cross-validation of models: k-fold and Leave-one-out.

All settings of Solver module can be configured in GUI.

On-line help.

Automatic detection of the number of CPU cores.

Minor changes.

Support for Unix delimiters in CSV files.

User interface minor changes.

Improved documentation.

User interface minor changes.

A user can save/load models and apply them to new data.

Update notification.

Fixed an infinite loop with “Forecast latest observations” switched-off.

Moved some Solver settings from rules.ini to panel.

Improved sidebar minimize/maximize code.

Rearrangement of Preprocessor options in Data manager.

Separate handling of text data in input and target variables.

5 options for missing value handling.

New data transformation type: Derivative.

Unlimited number of inputs (up to 1GB of input files).

Multi-target simulation report.

New error measures at Performance panel.

Bug fixes.

New button 'Save all settings' which is similar to save operation of Start button.

An option for handling any text as missing values.

Fixed problems with usage of custom missing value marks.

Fixed a crash in registration form, when there's no network.

Fixed normalizing transformation.

New Data Manager tool.

Support for multi-output simulations.

Import of big files is now quicker and uses less memory.

New registration dialog allows automatic and manual registration.

Selectable prediction accuracy metrics.

Minor improvements.

GMDH-type neural networks added.

Reduced memory usage on heavy imports.

New Quick Start Wizard.

New dialog for creation of a project.

Minor improvements.

Minor bug-fixes.

Nominal variables binary decomposition. Limited decomposition of most frequent variable values.

Handling of missing values.

Extended solver panel allows configuration of settings initially available only in rules.ini file.

Quantization of predictions.

Improved XLS import. Data block detection is now resistant to cells occasionally filled outside the data table.

Collapsing panels.

Plug-in window clean-up on new project loading.

Minor improvements.

Minor bug-fixes.

Initial release of GMDH Shell - forecasting software & time series analysis.