x <- 1:100
y <- vector()
for (i in x) {
if(i <= 5) y[i] <- f(x[i])#此处f()表示y与x的函数关系式
else y[i] <- y[i-5]
}
举一个例子吧，比如月度的数据，就是周期为12，它有季节影响。先对其1阶12步差分，通过看acf pac f看是简单加法模型，还是乘法季节模型如果是乘法模型那就要对季节部分模拟arima模型 季节部分的arima是以周期位置的acf pacf 确定其模型参数 ar maseasonal=list(order=c(_,1,_)，period=_)周期是默认的------------------------------------------------------------教你一个简单的方法：下载 forecast包，auto.arima( ) 直接拟合，就会给出系统认为的arima模型的各个参数。然后 forecast（ h=预测期数）行了。这是对外行人来说的，但是如果你真的想学好的话，还需要对模型进行着各种检验，特别是残差。FINS5542 Assignment 1Date Due: 3pm 17 August, in UNSW Business School Building as-signment box, ground oor, and electronic submission via the coursewebsite1. Find a time period for one of our assets (see over page) in whichthe technical indicator of when a 15 day moving average crosses a 65day moving average was a strong indicator of the future movement inthe asset price.Display a graph to demonstrate your ndings. Brie y describe yourndings. One should also print out the Ox computer code used tosolve this problem.[10 marks]2. Find a time period for one of our assets (see over page) in whichthe technical indicator of when a 50 day moving average crosses a 200day moving average was a strong indicator of帮写R语言程序、R语言代做留学生、调试R作业、R程序代做、帮做FINS5542 Assignment 1 the future movement inthe asset price.Display a graph to demonstrate your ndings. Brie y describe yourndings. One should also print out the Ox computer code used tosolve this problem.[10 marks]1Variable Nameaan1 CISCO SYSTEMS INCaan2 MICROSOFT CORPaan3 INTEL CORPaan4 TEXAS INSTRUMENTS INCaan5 SPRINT CORPaan6 AMGEN INCaan7 INTERPUBLIC GROUP COS INCaan8 MELLON BANK CORPaan9 WARNER LAMBERT COaan10 BRISTOL MYERS SQUIBB COaan11 ENRON CORPaan12 GENERAL ELECTRIC COaan13 TIME WARNER INCaan14 EXXON CORPaan15 DELL COMPUTER CORPaan16 AMERICAN EXPRESS COaan17 SUN MICROSYSTEMS INCaan18 CORNING INCaan19 FORD MOTOR CO DEL转自：http://ass.3daixie.com/2018091823003150.html
