Excluding Toggle coverage

Hi All, 

I am doing coverage part for my subsytem . I am using "set_toggle_excludefile" in my .ccf at the time of Elab . I am using patterns , so it is excluding some signals which are covered .i want to exclude only those which are not covered .

 I am using 12.2 version , ICCR. Please let me know any switch to exclude only uncovered toggles.

 Regards

Kiran