趁斑竹在,再请教一个问题。
我在看一篇文献,它里面这样说:
Systematic tradeoffs will exhibit the properties of either trend or drift, as well as possibly other temporal regularity identified by autocorrelation.
Autocorrelation in such processes is often interpreted as memory.
Trends indicate that an obvious long -term trade -off where one category has gained at the other’s expense has occurred.
Drift, on the other hand indicates that while extended periods where one category benefited relative to the other have occurred, the system does eventually return to some equilibrium level.
他将时间序列Y(t)的特征(nature of Y(t))分为drift和trend。
第一个trend,我将其理解为2个变量之间具有某种长期均衡关系。
但是drift他这里的解释是什么意思呀?是说短期内可能发生在这种交替关系,但是系统会纠正这种短期偏离,使得回归均衡水平吗?
如果从图形来看,时间序列数据具有漂移特征,到底是什么样的呢?


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