[R] Replace missing value within group with non-missing value
Leask, Graham
g.leask at aston.ac.uk
Sat Apr 6 19:12:47 CEST 2013
Hi Arun,
How odd. Directly pasting the code from your email precisely repeats the error.
See below. Any thoughts on the cause of this anomaly?
> dput(head(dat,50))
structure(list(dn = c(4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4), obs = c(1, 1,
1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4,
4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8,
8, 8, 8, 8, 9, 9), choice = c(0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0,
0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0), br = c(1,
2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4,
5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1,
2, 3, 4, 5, 6, 1, 2), mth = c(NA, NA, NA, NA, NA, 487, NA, NA,
488, NA, NA, NA, NA, NA, NA, NA, NA, 488, NA, NA, 489, NA, NA,
NA, NA, NA, NA, NA, NA, 489, NA, NA, NA, NA, NA, 489, NA, NA,
NA, NA, NA, 490, NA, NA, NA, NA, NA, 491, NA, NA)), .Names = c("dn",
"obs", "choice", "br", "mth"), row.names = c("1", "2", "3", "4",
"5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15",
"16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26",
"27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48",
"49", "50"), class = "data.frame")
> sp <- split(dat, list(dat$dn, dat$obs))
> names(sp) <- NULL
> tmp <- lapply(sp, function(x){
+ idx <- which(!is.na(x$mth))[1]
+ x$mth <- x$mth[idx]
+ x
+ })
Error in `$<-.data.frame`(`*tmp*`, "mth", value = NA_real_) :
replacement has 1 rows, data has 0
> head(do.call(rbind, tmp),7)
Error in do.call(rbind, tmp) : object 'tmp' not found
Best wishes
Graham
-----Original Message-----
From: arun [mailto:smartpink111 at yahoo.com]
Sent: 06 April 2013 17:25
To: Leask, Graham
Cc: Rui Barradas
Subject: Re: [R] Replace missing value within group with non-missing value
Hello,
By running Rui's code, I am getting this:
sp <- split(dat, list(dat$dn, dat$obs))
names(sp) <- NULL
tmp <- lapply(sp, function(x){
idx <- which(!is.na(x$mth))[1]
x$mth <- x$mth[idx]
x
})
head(do.call(rbind, tmp),7)
dn obs choice br mth
1 4 1 0 1 487
2 4 1 0 2 487
3 4 1 0 3 487
4 4 1 0 4 487
5 4 1 0 5 487
6 4 1 1 6 487
7 4 2 0 1 488
Couldn't reproduce the error you cited.
A.K.
----- Original Message -----
From: "Leask, Graham" <g.leask at aston.ac.uk>
To: Rui Barradas <ruipbarradas at sapo.pt>
Cc: "r-help at r-project.org" <r-help at r-project.org>
Sent: Saturday, April 6, 2013 12:16 PM
Subject: Re: [R] Replace missing value within group with non-missing value
Hi Rui,
Data as follows
structure(list(dn = c(4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4), obs = c(1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9), choice = c(0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0), br = c(1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2), mth = c(NA, NA, NA, NA, NA, 487, NA, NA, 488, NA, NA, NA, NA, NA, NA, NA, NA, 488, NA, NA, 489, NA, NA, NA, NA, NA, NA, NA, NA, 489, NA, NA, NA, NA, NA, 489, NA, NA, NA, NA, NA, 490, NA, NA, NA, NA, NA, 491, NA, NA)), .Names = c("dn", "obs", "choice", "br", "mth"), row.names = c("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50"), class = "data.frame")
Best wishes
Graham
-----Original Message-----
From: Rui Barradas [mailto:ruipbarradas at sapo.pt]
Sent: 06 April 2013 16:32
To: Leask, Graham
Cc: r-help at r-project.org
Subject: Re: [R] Replace missing value within group with non-missing value
Hello,
Can't you post a data example? If your dataset is named 'dat' use
dput(head(dat, 50)) # paste the output of this in a post
Rui Barradas
Em 06-04-2013 15:34, Leask, Graham escreveu:
> Hi Rui,
>
> Thank you for your suggestion which is very much appreciated. Unfortunately running this code produces the following error.
>
> error in '$<-.data.frame' ('*tmp*', "mth", value = NA_real_) :
> replacement has 1 rows, data has 0
>
> I'm sure there must be an elegant solution to this problem?
>
> Best wishes
>
>
>
> Graham
>
> On 6 Apr 2013, at 12:15, "Rui Barradas" <ruipbarradas at sapo.pt> wrote:
>
>> Hello,
>>
>> That's not a very good way of posting your data, preferably paste the output of ?dput in a post.
>> Some thing along the lines of the following might do what you want.
>> It seems that the groups are established by 'dn' and 'obs' numbers.
>> If so, try
>>
>>
>> # Make up some data
>> dat <- data.frame(dn = 4, obs = rep(1:5, each = 6), mth = NA)
>> dat$mth[6] <- 487 dat$mth[9] <- 488 dat$mth[18] <- 488 dat$mth[21] <-
>> 489 dat$mth[30] <- 489
>>
>>
>> sp <- split(dat, list(dat$dn, dat$obs))
>> names(sp) <- NULL
>> tmp <- lapply(sp, function(x){
>> idx <- which(!is.na(x$mth))[1]
>> x$mth <- x$mth[idx]
>> x
>> })
>> do.call(rbind, tmp)
>>
>>
>> Hope this helps,
>>
>> Rui Barradas
>>
>>
>> Em 06-04-2013 11:33, Leask, Graham escreveu:
>>> Dear List members
>>>
>>> I have a large dataset organised in choice groups see sample below
>>>
>>>
>>>+--------------------------------------------------------------------
>>>-----------------------------+
>>> | dn obs choice acid br date
>>>cdate situat~n mth year set |
>>>
>>>|--------------------------------------------------------------------
>>>-----------------------------|
>>> 1. | 4 1 0 LOSEC 1 .
>>>. . . 1 |
>>> 2. | 4 1 0 NEXIUM 2 .
>>>. . . 1 |
>>> 3. | 4 1 0 PARIET 3 .
>>>. . . 1 |
>>> 4. | 4 1 0 PROTIUM 4 .
>>>. . . 1 |
>>> 5. | 4 1 0 ZANTAC 5 .
>>>. . . 1 |
>>>
>>>|--------------------------------------------------------------------
>>>-----------------------------|
>>> 6. | 4 1 1 ZOTON 6 23aug2000 01:00:00
>>>23aug2000 NS 487 2000 1 |
>>> 7. | 4 2 0 LOSEC 1 .
>>>. . . 2 |
>>> 8. | 4 2 0 NEXIUM 2 .
>>>. . . 2 |
>>> 9. | 4 2 1 PARIET 3 25sep2000 01:00:00
>>>25sep2000 L 488 2000 2 | 10. | 4 2 0
>>>PROTIUM 4 . . . .
>>>2 |
>>>
>>>|--------------------------------------------------------------------
>>>-----------------------------| 11. | 4 2 0 ZANTAC
>>>5 . . . . 2 |
>>>12. | 4 2 0 ZOTON 6 .
>>>. . . 2 | 13. | 4 3 0 LOSEC
>>>1 . . . . 3 |
>>>14. | 4 3 0 NEXIUM 2 .
>>>. . . 3 | 15. | 4 3 0 PARIET
>>>3 . . . . 3 |
>>>
>>>|--------------------------------------------------------------------
>>>-----------------------------| 16. | 4 3 0 PROTIUM
>>>4 . . . . 3 |
>>>17. | 4 3 0 ZANTAC 5 .
>>>. . . 3 | 18. | 4 3 1 ZOTON
>>>6 20sep2000 00:00:00 20sep2000 R 488 2000 3 |
>>>19. | 4 4 0 LOSEC 1 .
>>>. . . 4 | 20. | 4 4 0 NEXIUM
>>>2 . . . . 4 |
>>>
>>>|--------------------------------------------------------------------
>>>-----------------------------| 21. | 4 4 1 PARIET
>>>3 27oct2000 00:00:00 27oct2000 NL 489 2000 4 |
>>>22. | 4 4 0 PROTIUM 4 .
>>>. . . 4 | 23. | 4 4 0 ZANTAC
>>>5 . . . . 4 |
>>>24. | 4 4 0 ZOTON 6 .
>>>. . . 4 | 25. | 4 5 0 LOSEC
>>>1 . . . . 5 |
>>>
>>>|--------------------------------------------------------------------
>>>-----------------------------| 26. | 4 5 0 NEXIUM
>>>2 . . . . 5 |
>>>27. | 4 5 0 PARIET 3 .
>>>. . . 5 | 28. | 4 5 0 PROTIUM
>>>4 . . . . 5 |
>>>29. | 4 5 0 ZANTAC 5 .
>>>. . . 5 | 30. | 4 5 1 ZOTON
>>>6 23oct2000 03:00:00 23oct2000 NS 489 2000 5 |
>>>
>>> I wish to fill in the missing values in each choice set - delineated by dn (Doctor) obs (Observation number) and choices (1 to 6).
>>> For each choice set one choice is chosen which contains full time
>>> information for that choice set ie in set 1 choice 6 was chosen and shows the month 487. The other 5 choices show mth as missing. I want to fill these with the correct mth.
>>>
>>> I am sure there must be an elegant way to do this in R?
>>>
>>>
>>> Best wishes
>>>
>>>
>>>
>>> Graham
>>>
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>
>
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