Impala Documentation

Kernel::Kernel	(	int	l,
		svm_node const	x,
		const svm_parameter &	param
	)

Definition at line 220 of file svm.cpp.

References clone(), dot(), kernel_function, kernel_linear(), kernel_poly(), kernel_rbf(), kernel_sigmoid(), kernel_type, POLY, RBF, SIGMOID, SVM_LINEAR, x, and x_square.

00221 :kernel_type(param.kernel_type), degree(param.degree),
00222  gamma(param.gamma), coef0(param.coef0)
00223 {
00224         switch(kernel_type)
00225         {
00226                 case SVM_LINEAR:
00227                         kernel_function = &Kernel::kernel_linear;
00228                         break;
00229                 case POLY:
00230                         kernel_function = &Kernel::kernel_poly;
00231                         break;
00232                 case RBF:
00233                         kernel_function = &Kernel::kernel_rbf;
00234                         break;
00235                 case SIGMOID:
00236                         kernel_function = &Kernel::kernel_sigmoid;
00237                         break;
00238         }
00239 
00240         clone(x,x_,l);
00241 
00242         if(kernel_type == RBF)
00243         {
00244                 x_square = new double[l];
00245                 for(int i=0;i<l;i++)
00246                         x_square[i] = dot(x[i],x[i]);
00247         }
00248         else
00249                 x_square = 0;
00250 }

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