luan_sheng wrote:
yea, I have read the help. But some one tell me that i f you want use a vector that you don't know it's length, you should use xx=numric(0) ,
is it
not right? If it isn't right, how can I do?
It depends on the context. Why do you need a vector, but don't know its length? Normally in a situation like that you'd just delay creating it until you knew the length. Duncan Murdoch