我有一个时间序列数据集,其中有些值是缺失的。我希望填充缺失值,但不确定哪种方法是最合适的,比如线性、样条或来自imputeTS
包的stine。
为了完整起见,我希望测试我的数据是MCAR、MAR还是NMAR。我有一个相当好的想法它是MCAR的,但我对进行测试感兴趣。
str(wideRawDF)
'data.frame': 1343 obs. of 13 variables:
$ Period.Start.Time: POSIXct, format: "2017-01-20 16:30:00" "2017-01-20 16:45:00" "2017-01-20 17:00:00" "2017-01-20 17:15:00" ...
$ DO0182U09A3 : num -102 -101 -101 -101 -101 ...
$ DO0182U09B3 : num -103.4 -102.8 -103.3 -95.9 -103 ...
$ DO0182U09C3 : num -103.9 -104.2 -103.9 -99.2 -104.1 ...
$ DO0182U21A1 : num -105 -105 -105 -104 -102 ...
$ DO0182U21A2 : num -105 -104 -105 -105 -105 ...
$ DO0182U21A3 : num -105 -105 -105 -105 -105 ...
$ DO0182U21B1 : num -102 -103 -104 -104 -104 ...
$ DO0182U21B2 : num -99.4 -102 -104 -101.4 -104.1 ...
$ DO0182U21B3 : num -104 -104 -104 -104 -104 ...
$ DO0182U21C1 : num -105 -105 -105 -104 -105 ...
$ DO0182U21C2 : num -104 -105 -105 -103 -105 ...
$ DO0182U21C3 : num -105 -105 -105 -105 -105 ...
md.pattern(wideRawDF)
Period.Start.Time DO0182U21C1 DO0182U21C2 DO0182U21C3 DO0182U21B1 DO0182U21B2 DO0182U21B3 DO0182U09A3 DO0182U09B3 DO0182U09C3 DO0182U21A1 DO0182U21A2
1327 1 1 1 1 1 1 1 1 1 1 1 1
3 1 1 1 1 1 1 1 0 1 1 1 1
1 1 1 1 1 1 1 1 1 0 1 1 1
2 1 1 1 1 1 1 1 1 1 0 1 1
1 1 1 1 1 1 1 1 0 1 1 0 0
1 1 1 1 1 1 1 1 0 0 1 0 0
3 1 1 1 1 1 1 1 1 0 0 0 0
2 1 1 1 1 1 1 1 0 0 0 0 0
3 1 1 1 1 0 0 0 1 0 0 0 0
0 0 0 0 3 3 3 7 10 10 10 10
DO0182U21A3
1327 1 0
3 1 1
1 1 1
2 1 1
1 0 4
1 0 5
3 0 5
2 0 6
3 0 8
10 66
您可以看到,我DF中的某些列没有NA值。我希望将只有NA值的列传递给MissMech软件包中的TestMCARNormality函数。
我尝试了以下操作,但仍然遇到同样的错误:
> TestMCARNormality(wideRawDF[,3:4])
Warning: 8 Cases with all variables missing have been removed
from the data.
Warning: More than one missing data pattern should be present.
使用colnames函数,我得到了与上述md.pattern输出相对应的列索引,以确保我使用有NA值的列。
> colnames(wideRawDF)
[1] "Period.Start.Time" "DO0182U09A3" "DO0182U09B3" "DO0182U09C3" "DO0182U21A1" "DO0182U21A2" "DO0182U21A3" "DO0182U21B1"
[9] "DO0182U21B2" "DO0182U21B3" "DO0182U21C1" "DO0182U21C2" "DO0182U21C3"
什么是测试缺失值的聪明方式,并将仅带有NAs的列传递给TestMCARNormality函数的方法?
wideRawDF[sapply(wideRawDF, function(x) any(is.na(x)))]
传递给TestMCARNormality()
。只应包括具有缺失值的列。 - Simon Jackson