Implements the stochastic variant of the Pegasos (Primal Estimated sub-GrAdient SOlver for SVM) method of Shalev-Shwartz et al
(2007).This implementation globally replaces all missing values and transforms nominal attributes into binary ones.
It also normalizes all attributes, so the coefficients in the output are based on the normalized data.For more information, see
Shalev-Shwartz, Y.Singer, N.
Srebro: Pegasos: Primal Estimated sub-GrAdient SOlver for SVM.In: 24th International Conference on MachineLearning, 807-814, 2007.
(based on WEKA 3.7)
For further options, click the 'More' - button in the dialog.
All weka dialogs have a panel where you can specify classifier-specific parameters.
F: Set the loss function to minimize. 0 = hinge loss (SVM), 1 = log loss (logistic regression). (default = 0)
L: The lambda regularization constant (default = 0.0001)
E: The number of epochs to perform (batch learning only, default = 500)
N: Don't normalize the data
M: Don't replace missing values
The Preliminary Attribute Check tests the underlying classifier against the DataTable specification at the inport of the node. Columns that are compatible with the classifier are marked with a green 'ok'. Columns which are potentially not compatible are assigned a red error message.
Important: If a column is marked as 'incompatible', it does not necessarily mean that the classifier cannot be executed! Sometimes, the error message 'Cannot handle String class' simply means that no nominal values are available (yet). This may change during execution of the predecessor nodes.
Capabilities: [Nominal attributes, Binary attributes, Unary attributes, Empty nominal attributes, Numeric attributes, Missing values, Binary class, Missing class values] Dependencies:  min # Instance: 0
It shows the command line options according to the current classifier configuration and mainly serves to support the node's configuration via flow variables.
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A zipped version of the software site can be downloaded here.
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