table optimal support vector machine parameters for the data zy ny - - - - - - - - - - it follows that the normal vector of the plane is bai zi [- - ]is where is the set of indices of the support vectors we see that the plane is almost perpendicular to the plane the bias term can also be found from the table above in particularfor any xand in table we have bz to draw the separating boundary in we need to project the intersection of the separating plane with the quadratic surface onto the plane that iswe need to find all points ( such that ( ( this is the equation of circle with (approximatecenter ( - and radius which is very close to the true circular boundary between the two groupswith center ( and radius this circle is drawn in figure - - figure the circular decision boundary can be viewed equivalently as (athe projection onto the plane of the intersection of the separating plane with the quadratic surface (both in )or (bthe set of points ( for which gt (xb bph( an equivalent way to derive this circular separating boundary is to consider the feature map ph( [ ]on which defines reproducing kernel (xx ph( )ph( )