Try this
local cameraspositions = {
{ 329.10980224609, -2117.2749023438, 50.161201477051, 329.65179443359, -2116.4926757813, 49.853763580322 },
{ -224.32290649414, -153.71020507813, 35.085899353027, -223.61195373535, -153.04695129395, 34.852146148682 }
}
local ind = math.random ( #cameraspositions )
setCameraMatrix ( p, unpack ( cameraspositions[ind] ) )