我发现data.table和integer64中的错误吗 [英] Is it a bug in data.table and integer64 I found

问题描述

data.table 和 integer64 （软件包 bit64 ）>我的理解是 integer64 尚不能在 by 子句中使用。虽然我可能在 排序中发现了一个错误。

I am having a lot of difficulties with data.table and integer64 (package bit64)> My understanding is that integer64 cannot yet be used in a by clause. Though I might have found a bug in the "sort".

library(data.table)
library(bit64)

test4 <- structure(list(IDFD = c("360627720722618433", "360627720722618433"
), CDVCA = c("2013-03-13T09:36:07.795", "2013-03-13T09:36:07.795"
), NUMSEQ = structure(c(1.05397451390436e-309, 1.05397443975625e-309
), class = "integer64")), .Names = c("IDFD", "CDVCA", "NUMSEQ"
), row.names = c(NA, -2L), class = "data.frame")

str(test4)
'data.frame':   2 obs. of  3 variables:
 $ IDFD  : chr  "360627720722618433" "360627720722618433"
 $ CDVCA : chr  "2013-03-13T09:36:07.795" "2013-03-13T09:36:07.795"
 $ NUMSEQ:Class 'integer64'  num [1:2] 1.05e-309 1.05e-309

test4 <- as.data.table(test4)

str(test4)
Classes ‘data.table’ and 'data.frame':  2 obs. of  3 variables:
 $ IDFD  : chr  "360627720722618433" "360627720722618433"
 $ CDVCA : chr  "2013-03-13T09:36:07.795" "2013-03-13T09:36:07.795"
 $ NUMSEQ:Class 'integer64'  num [1:2] 1.05e-309 1.05e-309
 - attr(*, ".internal.selfref")=<externalptr> 

setkey(test4,IDFD,CDVCA,NUMSEQ)
test4
                 IDFD                   CDVCA          NUMSEQ
1: 360627720722618433 2013-03-13T09:36:07.795 213326816542720
2: 360627720722618433 2013-03-13T09:36:07.795 213326801534975 #THIS IS NOT SORTED !!

我对吗？

推荐答案

更新：现在已在v1.9.3中实现（可从R-Forge获得），请参见新闻：

Update: This is now implemented in v1.9.3 (available from R-Forge), see NEWS :

o bit64 :: integer64 现在可用于分组和联接，＃5369。感谢James Sams突出显示了UPC和Clayton Stanley。

提醒： fread（）能够检测并读取 integer64 一段时间。

o bit64::integer64 now works in grouping and joins, #5369. Thanks to James Sams for highlighting UPCs and Clayton Stanley.
Reminder: fread() has been able to detect and read integer64 for a while.

在上述OP中：

test4
#                  IDFD                   CDVCA          NUMSEQ
# 1: 360627720722618433 2013-03-13T09:36:07.795 213326801534975 ## sorted right
# 2: 360627720722618433 2013-03-13T09:36:07.795 213326816542720

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