[英]Error with ARIMA
我正在尝试在.csv文件中的时间数据集上运行ARIMA。 到目前为止,这是我的代码:
Oil_all <- read.delim("/Users/Jkels/Documents/Introduction to Computational
Statistics/Oil production.csv",sep="\t",header=TRUE,stringsAsFactors=FALSE)
Oil_all
该文件如下所示:
year.mbbl
1 1880,30
2 1890,77
3 1900,149
4 1905,215
5 1910,328
6 1915,432
7 1920,689
8 1925,1069
9 1930,1412
10 1935,1655
11 1940,2150
12 1945,2595
13 1950,3803
14 1955,5626
15 1960,7674
16 1962,8882
17 1964,10310
18 1966,12016
19 1968,14104
20 1970,16690
21 1972,18584
22 1974,20389
23 1976,20188
24 1978,21922
25 1980,21732
26 1982,19403
27 1984,19608
码:
apply(Oil_all,1,function(x) sum(is.na(x)))
结果:
[1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
当我运行ARIMA时:
library(forecast)
auto.arima(Oil_all,xreg=year)
这是错误:
Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) :
0 (non-NA) cases
In addition: Warning message:
In data.matrix(data) : NAs introduced by coercion
因此,我能够调用数据集并进行打印。 但是,当我去检查值是否与apply函数一起出现时,我看到的全为0,所以我知道出了点问题,这可能就是为什么我得到此错误。 我只是不确定错误的含义或如何在代码中修复它。
有什么建议吗?
如果我对您的问题正确,应该是这样的:
Oil_all <- read.csv("myfolder/myfile.csv",header=TRUE)
## I don't have your source data, so I tried to reproduce it with the data you printed
Oil_all
year value
1 1880 30
2 1890 77
3 1900 149
4 1905 215
5 1910 328
6 1915 432
7 1920 689
8 1925 1069
9 1930 1412
10 1935 1655
11 1940 2150
12 1945 2595
13 1950 3803
14 1955 5626
15 1960 7674
16 1962 8882
17 1964 10310
18 1966 12016
19 1968 14104
20 1970 16690
21 1972 18584
22 1974 20389
23 1976 20188
24 1978 21922
25 1980 21732
26 1982 19403
27 1984 19608
library(forecast)
auto.arima(Oil_all$value,xreg=Oil_all$year)
Series: Oil_all$value
ARIMA(3,0,0) with non-zero mean
Coefficients:
ar1 ar2 ar3 intercept Oil_all$year
1.2877 0.0902 -0.4619 -271708.4 144.2727
s.e. 0.1972 0.3897 0.2275 107344.4 55.2108
sigma^2 estimated as 642315: log likelihood=-221.07
AIC=454.15 AICc=458.35 BIC=461.92
您的导入应为
Oil_all<-read.csv("/Users/Jkels/Documents/Introduction to Computational Statistics/Oil production.csv")
这就是为什么您的数据很奇怪的原因。 抱歉,我没有发表评论的名声。我和Nemesi一样,后来奏效了。 我认为您正在尝试将csv导入为制表符分隔的文件。
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