data.table无法识别过滤器中的逻辑 [英] data.table not recognising logical in filter

问题描述

在以下代码段中，data.table在i中使用时似乎不识别逻辑。

我在一个最小示例中重现问题的所有尝试都失败了，这就是为什么我在这里发布完整的部分。我期望它与部分as.logical（cumsum（CURRENT_TRIP））相关，但只是一个直觉... ...

 ＃Testdata 
 timetable<  -  data.table（rbind（
c（r1，t1_1，p1，10，10），
c（r1 t1_1，p2，11,11），
c（r1，t1_1，p3，12,12），
c（r1，t1_1，p4 ，13,13），
c（r1，t1_1，p5，14,14），
c（r1，t1_1，p6，15,15） ，
c（r1，t1_1，p7，16,16），
c（r1，t1_1，p8，17，17），
c r1，t1_1，p9，18,18），
c（r1，t1_1，p10，19,19），
 
c ，t2，p11，9,9），
c（r2，t2，p12，10,10），
c p3，11,11），
c（r2，t2，p13，12,12），
c（r2，t2 13），
c（r2，t2，p15，14,14），
c（r2，t2，p16，15,15） bc（r2，t2，p17，16，16），
c（r2，t2，p18，17，17）
） 
 timetable [，'：='（ARRIVAL = as.integer（ARRIVAL），DEPARTURE =）; setnames（timetable，c（ROUTE，TRIP，STOP，ARRIVAL，DEPARTURE as.integer（DEPARTURE））] 
 
 
＃输入
 startStation<  - p3
 startTime < -  8 
 
 setorder（timetable，TRIP，ARRIVAL）
 timetable [，ID：= .I] 
 
 timetable [，'：='（ARR_ROUND_PREV = Inf，ARR_ROUND = Inf，ARR_BEST = Inf，MARKED = F，CURRENT_TRIP = F）] 
 timetable [STOP == startStation，'：='（ARR_ROUND_PREV = startTime，ARR_ROUND = startTime，ARR_BEST = startTime，MARKED = T）] 
 
 <  - 时间表[MARKED == T，unique（ROUTE）] 
 ID<  -  timetable [MARKED == T& DEPARTURE> ARR_ROUND，。（ID = ID [DEPARTURE == min（DEPARTURE）]），by = ROUTE] [，ID] 
 
 timetable [ID％in％ids，CURRENT_TRIP：= T] 
时间表[，MARKED：= F] 
 
旅行< - 时间表[CURRENT_TRIP == T，独特（TRIP）] 
时间表[TRIP％，百分比，CURRENT_TRIP：= as。 logical（cumsum（CURRENT_TRIP）），by = TRIP] 
 
＃？ 
 timetable 
 nrow（timetable [CURRENT_TRIP == T]）＃8 
 sum（timetable $ CURRENT_TRIP == T）＃15 
 
＃but 
 nrow（timetable [CURRENT_TRIP> 0]）＃15 
 nrow（timetable [CURRENT_TRIP == 1L]）＃15 
  

任何想法？

问题出现在使用最新的1.9.7和1.9.6和R 3.2.3在Win 64位

Fab

解决方案

p>

数据的奇怪问题。表行搜索

我也无法使用最小代码重现它！

我对您的代码的解决方案正在改变您设置列CURRENT_TRIP的方式。

 时间表[ID％in％ids] $ CURRENT_TRIP<  -  T 
 timetable [，MARKED：= F] 
 
 trips<  - 时间表[CURRENT_TRIP == T，独特（TRIP）] 
时间表[TRIP％在％trips] $ CURRENT_TRIP<  - 时间表[，asslogical（cumsum CURRENT_TRIP）），by = TRIP] $ V1 
 
＃？ 
 timetable 
 nrow（timetable [CURRENT_TRIP == T]）＃8 
 sum（timetable $ CURRENT_TRIP == T）＃15 
 
＃but 
 nrow（timetable [CURRENT_TRIP> 0]）＃15 
 nrow（timetable [CURRENT_TRIP == 1L]）＃15 
  

使用dT [，Column：= T]符号设置列也导致我同样的问题！我不知道为什么，我与data.tables的创建者联系来解决这个问题！

in the following snippet, data.table does not seem to recognize logicals when used in i.

All my attempts to reproduce the problem in a minimal example failed, that's why I am posting the complete section here. I expect it to be related to the part "as.logical(cumsum(CURRENT_TRIP))", but just a gut feeling...

# Testdata
timetable <- data.table(rbind(
    c("r1", "t1_1", "p1", 10, 10),
    c("r1", "t1_1", "p2", 11, 11),
    c("r1", "t1_1", "p3", 12, 12),
    c("r1", "t1_1", "p4", 13, 13),
    c("r1", "t1_1", "p5", 14, 14),
    c("r1", "t1_1", "p6", 15, 15),
    c("r1", "t1_1", "p7", 16, 16),
    c("r1", "t1_1", "p8", 17, 17),
    c("r1", "t1_1", "p9", 18, 18),
    c("r1", "t1_1", "p10", 19, 19),

    c("r2", "t2", "p11", 9, 9),
    c("r2", "t2", "p12", 10, 10),
    c("r2", "t2", "p3", 11, 11),
    c("r2", "t2", "p13", 12, 12),
    c("r2", "t2", "p14", 13, 13),
    c("r2", "t2", "p15", 14, 14),
    c("r2", "t2", "p16", 15, 15),
    c("r2", "t2", "p17", 16, 16),
    c("r2", "t2", "p18", 17, 17)
  ))
setnames(timetable, c("ROUTE", "TRIP", "STOP", "ARRIVAL", "DEPARTURE"))
timetable[, ':='(ARRIVAL = as.integer(ARRIVAL), DEPARTURE = as.integer(DEPARTURE))]


# Input
startStation <- "p3"
startTime <- 8

setorder(timetable, TRIP, ARRIVAL)
timetable[, ID := .I]

timetable[,':='(ARR_ROUND_PREV = Inf, ARR_ROUND = Inf, ARR_BEST = Inf, MARKED = F, CURRENT_TRIP = F)]
timetable[STOP == startStation, ':='(ARR_ROUND_PREV = startTime, ARR_ROUND = startTime, ARR_BEST = startTime, MARKED = T)]

routes <- timetable[MARKED == T, unique(ROUTE)] 
ids <- timetable[MARKED == T & DEPARTURE > ARR_ROUND, .(ID = ID[DEPARTURE == min(DEPARTURE)]), by = ROUTE][, ID]

timetable[ID %in% ids, CURRENT_TRIP := T]
timetable[, MARKED := F]

trips <- timetable[CURRENT_TRIP == T, unique(TRIP)]
timetable[TRIP %in% trips, CURRENT_TRIP := as.logical(cumsum(CURRENT_TRIP)), by = TRIP]

# ?
timetable
nrow(timetable[CURRENT_TRIP == T]) #8
sum(timetable$CURRENT_TRIP == T) #15

# but 
nrow(timetable[CURRENT_TRIP > 0]) #15
nrow(timetable[CURRENT_TRIP == 1L]) #15

any ideas?

Problem shows up using newest 1.9.7 and 1.9.6 and R 3.2.3 on Win 64bit

Fab

解决方案

You have exactly the same bug that I have!!!

Strange issue with data.table row search

I also could not reproduce it with a minimal code!

My solution to your code is changing how you set the column CURRENT_TRIP.

timetable[ID %in% ids]$CURRENT_TRIP <- T
timetable[, MARKED := F]

trips <- timetable[CURRENT_TRIP == T, unique(TRIP)]
timetable[TRIP %in% trips]$CURRENT_TRIP <- timetable[,as.logical(cumsum(CURRENT_TRIP)), by = TRIP]$V1

# ?
timetable
nrow(timetable[CURRENT_TRIP == T]) #8
sum(timetable$CURRENT_TRIP == T) #15

# but 
nrow(timetable[CURRENT_TRIP > 0]) #15
nrow(timetable[CURRENT_TRIP == 1L]) #15

Using the dT[,Column:=T] notation for setting up columns also caused me the same issue! I am not sure why and I am in touch with the creator of data.tables to fix this!

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