MATLAB File Help: prtKernelRbf
  prtKernelRbf  Radial basis function kernel
   KERNOBJ = prtKernelRbf Generates a kernel object implementing a
   radial basis function.  Kernel objects are widely used in several
   prt classifiers, such as prtClassRvm and prtClassSvm.  RBF kernels
   implement the following function for 1 x N vectors x1 and x2:
    k(x1,x2) = exp(-sum((x1-x2).^2)./sigma.^2);
   KERNOBJ = prtKernelRbf(PROPERTY1, VALUE1, ...) constructs a
   prtKernelRbfNdimensionScale object KERNOBJ with properties as specified by
   PROPERTY/VALUE pairs. prtKernelRbf objects have the following
   user-settable properties:
   KERNOBJ = prtKernelRbf(param,value,...) with parameter value
   strings sets the relevant fields of the prtKernelRbf object to have
   the corresponding values.  prtKernelRbf objects have the following
   user-settable properties:
    sigma   - Positive scalar value specifying the width of the
              Gaussian kernel in the RBF function.  (Default value is 1)
   Radial basis function kernels are widely used in the machine
   learning literature. For more information on these kernels, please
   refer to:
    prtKernelRbf objects inherit the TRAIN and RUN methods from prtKernel.
    % Example
    ds = prtDataGenBimodal;       % Generate a dataset
    k1 = prtKernelRbf;            % Create a prtKernel object with 
                                  % default value of sigma 
    k2 = prtKernelRbf('sigma',2); % Create a prtKernel object with
                                  % specified value of sigma
    k1 = k1.train(ds); % Train
    g1 =; % Evaluate
    k2 = k2.train(ds); % Train
    g2 =; % Evaluate
    subplot(2,1,1); imagesc(g1.getObservations);  %Plot the results
    subplot(2,1,2); imagesc(g2.getObservations);
See also
Class Details
Superclasses prtKernel
Sealed false
Construct on load false
Constructor Summary
prtKernelRbf Radial basis function kernel 
Property Summary
dataSet The training prtDataSet, only stored if verboseStorage is true.  
dataSetSummary Structure that summarizes prtDataSet. 
isCrossValidateValid False 
isTrained Indicates if prtAction object has been trained. 
name RBF Kernel 
nameAbbreviation RBF 
sigma The inverse kernel width 
userData User specified data 
verboseStorage Specifies whether or not to store the training prtDataset. 
Method Summary
  and Combine 2 prtKernels into a prtKernelSet 
  get get the object properties 
  optimize Optimize action parameter by exhaustive function maximization. 
  run Run a prtAction object on a prtDataSet object. 
  set set the object properties 
  train Train a prtAction object using training a prtDataSet object.