我试图在.csv文件中的时态数据集上运行ARIMA。到目前为止,我的代码如下:
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代码:
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)这是一个错误:
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所以,我可以调用数据集并打印出来。但是,当我去检查这些值是否与apply函数一起存在时,我看到了所有的0,所以我知道有些地方不对劲,这可能就是我得到错误的原因。我只是不知道这个错误意味着什么,也不知道如何在代码中修复它。
有什么建议吗?
发布于 2015-08-05 00:28:38
如果我把你的问题说对了,那就应该是:
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发布于 2015-08-05 00:49:56
你的进口应该是
Oil_all<-read.csv("/Users/Jkels/Documents/Introduction to Computational Statistics/Oil production.csv")这就是为什么你的数据很奇怪。对不起,我没有这个名声,我和Nemesi做了同样的事情,那时候起了作用。我认为您正在尝试将csv导入为选项卡分隔的文件。
https://stackoverflow.com/questions/31819666
复制相似问题