graphdot.microkernel.composite module

graphdot.microkernel.composite.Composite(oper, **kw_kernels)

Creates a microkernel on multiple features, which uses a reduction operator to combine the outputs of multiple microkernels on individual features. \(k_\mathrm{composite}(X, Y; \mathrm{op}) = k_{a_1}(X_{a_1}, Y_{a_1})\,\mathrm{op}\,k_{a_2}(X_{a_2}, Y_{a_2})\, \mathrm{op}\,\ldots\)

Parameters:

• oper (str) – A reduction operator. Due to positive definiteness requirements, the available options are currently limited to ‘+’, ‘*’.
• kw_kernels (dict of attribute=kernel pairs) – The kernels can be any microkernels and their compositions as defined in this module, while features should be strings that represent valid Python/C++ identifiers.