K-Means
K-MEANS | ||||
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Parameters | values | Definition | ||
Kernel Type | 0. LINEAR | linear: u'*v | ||
1. POLYNOMIAL | polynomial: (gamma*u'*v + coef0)^degree | |||
2. RBF | radial basis function: exp(-gamma*|u-v|^2) This kernel nonlinearly maps samples into a higher dimensional space so it, unlike the linear kernel, can handle the case when the relation between className labels and attributes is nonlinear. | |||
3. SIGMOID | sigmoid: tanh(gamma*u'*v + coef0) | |||
Gamma | gamma defines how much influence a single training example has. The larger gamma is, the closer other examples must be to be affected. | |||
Coef0 | Degree of the polynomial kernel function. Ignored by all other kernels. | |||
Degree | Independent term in kernel function. It is only significant in 'polynomial' and 'sigmoid'. | |||
Dimension (Number of Attributes) | Number of input attributes / columns in the training data set | |||
Number of Centers | Number of clusters | |||
Stopping Criteria | Tolerance for stopping criterion. The stopping tolerance affects the number of iterations used when optimizing the model. | |||
Number of Rows | Total number of records / rows in the training data |