我有一个主要的XTS对象“数据”,其中包含跨越22天的约1M行。我有另一个XTS对象“Set”有22行,每天有1个条目。我想将这个较小的XTS对象组合成较大的XTS对象,这样它就会有一个额外的列包含当天Set中的值。
首先我尝试了:
> Data=cbind(Data,as.numeric(Set[as.Date(index(Data[]))]))
Error in error(x, ...) :
improper length of one or more arguments to merge.xts
然后我尝试了:
> Data=cbind(Data,1)
> Data[,6]=as.numeric(Set[as.Date(index(Data[,6]))])
Error in NextMethod(.Generic) :
number of items to replace is not a multiple of replacement length
我也试过没有as.numeric但收到了同样的错误。我尝试将Data转换为data.frame并得到错误:
Error in `[<-.data.frame`(`*tmp*`, , 6, value = c(1, 397.16, 397.115, :
replacement has 22 rows, data has 835771
我做错了什么,我该如何做到这一点?我过去两周才使用过R。
谢谢!
> str(Data)
An ‘xts’ object from 2012-01-03 05:01:05 to 2012-01-31 14:59:59 containing:
Data: num [1:835771, 1:5] 397 397 397 397 397 ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : chr [1:5] "SYN" "\"WhitePack.BID_SIZE\"" "\"WhitePack.BID_PRICE\"" "\"WhitePack.ASK_PRICE\"" ...
Indexed by objects of class: [POSIXct,POSIXt] TZ:
xts Attributes:
NULL
> str(Set)
An ‘xts’ object from 2012-01-02 to 2012-01-31 containing:
Data: chr [1:22, 1] " 1.000" "397.160" "397.115" "397.175" "397.200" "397.390" "397.560" "397.580" "397.715" ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : chr "Settle"
Indexed by objects of class: [POSIXct,POSIXt] TZ:
xts Attributes:
NULL
答案 0 :(得分:1)
你获得成功:
df3 <- merge(Data, Set)
为了解决我对原始问题缺乏充分理解的问题,我认为唯一的另一步是:
df3[, 6] <- na.locf( df3[, 6] )