The CORadioMatrix is a modification of RadioMatrix which really allows a matrix of RadioButtons unlike the original which only allowed a row. Instead of isVertical, this has been replaced with numberColumns. A table of RadioButtons will be built with that number of columns.
In order to distinguish the WORadioButtons used in this component from those in any other component, you must pass a name 'matrixName'. In addition, you must pass an array of strings 'list' that will serve as the labels and the values of the radio buttons. Finally, you must indicate which items 'selections' are selected