Standard Hough Circle Detection ( Parameter space )

Hello forum,

For the Hough Line Transform, it is possible to plot/view the parameter space as shown in the tutorial http://www.mathworks.com/help/images/ref/hough.html

The question is, how do I plot/view the parameter space using the standard Hough Circle Transform ? If there isnt any built in function then I guess ill have to write my own code for it ?

Regards, Haziq