SigmoidKernel.m

Go to the documentation of this file.

namespace kernels{


/* (Autoinserted by mtoc++)
 * This source code has been filtered by the mtoc++ executable,
 * which generates code that can be processed by the doxygen documentation tool.
 *
 * On the other hand, it can neither be interpreted by MATLAB, nor can it be compiled with a C++ compiler.
 * Except for the comments, the function bodies of your M-file functions are untouched.
 * Consequently, the FILTER_SOURCE_FILES doxygen switch (default in our Doxyfile.template) will produce
 * attached source files that are highly readable by humans.
 *
 * Additionally, links in the doxygen generated documentation to the source code of functions and class members refer to
 * the correct locations in the source code browser.
 * However, the line numbers most likely do not correspond to the line numbers in the original MATLAB source files.
 */

class SigmoidKernel
  :public kernels.BaseKernel {
    public:

        kappa = 1;
        nu = -1;
    public:


        SigmoidKernel(kappa,nu) {
            this.registerProps(" kappa "," nu ");
            this.IsScProd= true;
            if nargin > 0
                this.kappa= kappa;
                if nargin > 1
                    this.nu= nu;
                end
            end
        }


        function copy = clone() {
            copy = clone@kernels.BaseKernel(this, kernels.SigmoidKernel);
            copy.kappa= this.kappa;
            copy.nu= this.nu;
        }


        function c = getGlobalLipschitz() {
            error(" Not implemented yet! ");
        }
        function Nabla = getNabla(colvec<double> x,matrix<double> y) {
            error(" Not implemented yet! ");
        }
        function K = evaluate(colvec<double> x,matrix<double> y) {
            if ~isempty(this.P)
                x = x(this.P,:);
            end
            if nargin == 2 || isempty(y)
                y = x;
            else
                if ~isempty(this.P)
                    y = y(this.P,:);
                end
            end
            K = tanh( this.kappa * x^t*(this.G*y) + this.nu);
        }


        
#if 0 //mtoc++: 'set.kappa'
function  kappa(value) {
            if ~isposrealscalar(value)
                error(" kappa must be a real scalar and positive ");
            end
            this.kappa= value;
        }

#endif


        
#if 0 //mtoc++: 'set.nu'
function  nu(value) {
            if ~isposrealscalar(-value)
                error(" kappa must be a real scalar and negative ");
            end
            this.nu= value;
        }

#endif

    
};
}