Support Vector Machine Sphere Radius and Center

I have a question regarding the SVMTRAIN. It spits out the argument SVMStruct. I was trying to compute the Radius and center of the hypersphere that is used to classify if a sample X belongs to class A or B. Is the radius and center of the sphere available in the SVMStruct? If so where? If not, how can i calculate those two parameters?

[Pooja Guhan]

Did you find the solution to your problem ? Can you please share it ?