[Closed] Slice a plane

Im new to maxscript and i try to do some simple stuff like sliceing a plane. (converted to editable poly)

I got this code

for obj in $ do
(
	obj.slice [14,0,0] [0,0,0]
)

I know that slice have to have 2 arguments but i cant figure out what they mean. For me it looks

obj.slice [14,0,0] [0,0,0]

slices the plan at the same place (verticaly) as eg

obj.slice [1,0,0] [0,0,0]

does.

thanks