Hi
I am not sure if I catch it correctly but from your example state has
preference over state new except in the case where state is 0.
I would change state_bef 0 to NA and use na.locf function from zoo package.
test$state_bef[test$state_bef=="0"] <- NA
test$state_bef <- na.locf(test$state_bef, na.rm=FALSE)
test$state_new <- ifelse(test$state == "0", as.character(test$state_bef),
as.character(test$state))
library(zoo)
# as you failed to use dput for data I need to do some transformation before I
got appropriate object.
temp<-read.delim("clipboard", header=F, sep=" ")
temp<-t(temp)
temp<-t(temp[complete.cases(temp),])
temp<-data.frame(temp)
names(temp)[4:6]<-c("state", "state_bef", "state_new")
# here is the code
temp$state_bef[temp$state_bef=="0"] <- NA
temp$state_bef <- na.locf(temp$state_bef, na.rm=FALSE)
temp$state_new <- ifelse(temp$state == "0", as.character(temp$state_bef),
as.character(temp$state))
temp
V1 V2 V3 state state_bef state_new
1 279 2011-11-12 08:24:57 a <NA> a
2 280 2011-11-12 08:31:42 b a b
3 281 2011-11-13 00:00:00 0 b b
4 282 2011-11-14 00:00:00 0 b b
5 283 2011-11-15 00:00:00 0 b b
6 284 2011-11-16 00:00:00 0 b b
7 285 2011-11-17 00:00:00 0 b b
8 286 2011-11-18 00:00:00 0 b b
9 287 2011-11-19 00:00:00 0 b b
10 288 2011-11-19 06:13:18 a b a
11 289 2011-11-19 06:40:06 b a b
12 290 2011-11-19 08:56:54 a b a
13 291 2011-11-19 09:19:39 b a b
>
which results in desired solution.
Cheers
Petr
> -----Original Message-----
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of zuzana
> zajkova
> Sent: Tuesday, January 20, 2015 11:15 PM
> To: r-help@r-project.org
> Subject: [R] Assign value to a row in dataframe
>
> Hi,
>
> I have probably basic question, but I would be happy if somebody could
> help
> me with this:
>
> I have a dataframe where I want to assign a value to other column
> copying
> the value in previous row under some condition.
>
> Here is an example (dput on the end of message):
>
> > test[278:290,]
> datetime state state_bef state_new
> 279 2011-11-12 08:24:57 a 0 a
> 280 2011-11-12 08:31:42 b a b
> 281 2011-11-13 00:00:00 0 b b
> 282 2011-11-14 00:00:00 0 0 b
> 283 2011-11-15 00:00:00 0 0 0
> 284 2011-11-16 00:00:00 0 0 0
> 285 2011-11-17 00:00:00 0 0 0
> 286 2011-11-18 00:00:00 0 0 0
> 287 2011-11-19 00:00:00 0 0 0
> 288 2011-11-19 06:13:18 a 0 a
> 289 2011-11-19 06:40:06 b a b
> 290 2011-11-19 08:56:54 a b a
> 291 2011-11-19 09:19:39 b a b
>
>
> What I need is:
> if state != "0", the state_new==state
> if state == "0" & state_bef!="0", the state_new==state_bef
> if state == "0" & state_bef=="0", the state_new==state_bef of the
> previous
> row.
> The idea is when there is "00:00:00" in datetime, I need to repeat the
> last
> "state" value in the "state_new"
>
> I have tried various ifelse conditions and loops, the last is this,
> which
> doesn't work for all rows:
>
> test$state_new[test$state!="0"] <- test$state[test$state!="0"]
> test$state_new[test$state=="0" & test$state_bef!="0"] <-
> test$state_bef[test$state=="0" & test$state_bef!="0"]
> test$state_new[test$state=="0" & test$state_bef=="0"] <-
> test$state_new[test$state=="0" & test$state_bef=="0"] # doesn't work
> for
> all rows...
>
> This should be the result
>
> datetime state state_bef state_new
> 279 2011-11-12 08:24:57 a 0 a
> 280 2011-11-12 08:31:42 b a b
> 281 2011-11-13 00:00:00 0 b b
> 282 2011-11-14 00:00:00 0 0 b
> 283 2011-11-15 00:00:00 0 0 b
> 284 2011-11-16 00:00:00 0 0 b
> 285 2011-11-17 00:00:00 0 0 b
> 286 2011-11-18 00:00:00 0 0 b
> 287 2011-11-19 00:00:00 0 0 b
> 288 2011-11-19 06:13:18 a 0 a
> 289 2011-11-19 06:40:06 b a b
> 290 2011-11-19 08:56:54 a b a
> 291 2011-11-19 09:19:39 b a b
>
>
> In the dataframe I send as an example there is just one block of this
> repeated "0" values, but within real dataframe there are more blocks
> like
> that.
>
> Thanks for any ideas!
>
> Best regards,
>
> Zuzana
>
>
>
>
>
>
> > dput(test)
> structure(list(datetime = structure(c(1320264600, 1320265473,
> 1320266409, 1320266418, 1320266460, 1320267591, 1320268350, 1320268371,
> 1320276948, 1320277332, 1320278400, 1320280380, 1320283950, 1320283977,
> 1320286293, 1320287010, 1320287022, 1320287055, 1320287604, 1320288678,
> 1320295476, 1320296490, 1320296766, 1320300015, 1320319140, 1320320367,
> 1320331629, 1320333789, 1320354315, 1320355689, 1320360000, 1320364800,
> 1320366489, 1320378507, 1320378702, 1320393177, 1320394809, 1320412825,
> 1320413140, 1320417361, 1320418849, 1320418855, 1320419854, 1320419860,
> 1320420244, 1320420268, 1320420277, 1320451200, 1320452443, 1320455566,
> 1320455716, 1320455839, 1320455845, 1320455851, 1320455896, 1320456094,
> 1320456109, 1320457492, 1320458053, 1320460879, 1320465739, 1320465748,
> 1320466018, 1320469426, 1320469468, 1320475630, 1320476410, 1320482851,
> 1320489187, 1320490969, 1320495052, 1320495061, 1320519571, 1320519580,
> 1320519610, 1320520594, 1320520600, 1320520618, 1320520624, 1320520636,
> 1320526588, 1320527017, 1320537600, 1320554581, 1320554911, 1320554926,
> 1320554941, 1320571210, 1320573523, 1320608509, 1320609532, 1320611587,
> 1320616504, 1320616513, 1320616768, 1320618364, 1320620602, 1320620833,
> 1320622147, 1320623194, 1320624000, 1320632149, 1320632164, 1320632446,
> 1320646327, 1320646810, 1320663212, 1320663716, 1320665483, 1320665870,
> 1320666332, 1320666665, 1320666680, 1320666689, 1320666899, 1320666968,
> 1320668141, 1320668147, 1320669017, 1320669545, 1320670070, 1320670076,
> 1320670118, 1320670130, 1320670154, 1320670166, 1320670175, 1320670181,
> 1320670232, 1320670244, 1320670262, 1320670700, 1320671432, 1320671891,
> 1320672518, 1320673208, 1320673478, 1320673484, 1320673556, 1320673628,
> 1320673706, 1320673739, 1320673751, 1320673769, 1320673775, 1320673799,
> 1320673817, 1320673835, 1320673853, 1320674531, 1320675434, 1320675968,
> 1320676139, 1320676154, 1320676592, 1320677327, 1320677822, 1320678038,
> 1320678047, 1320678179, 1320678185, 1320678533, 1320679199, 1320679535,
> 1320679718, 1320682901, 1320683333, 1320684239, 1320684248, 1320684362,
> 1320685019, 1320685346, 1320685718, 1320686645, 1320710400, 1320711704,
> 1320712352, 1320721790, 1320722021, 1320722066, 1320722237, 1320730745,
> 1320730766, 1320730784, 1320730886, 1320730892, 1320730904, 1320730955,
> 1320731075, 1320731120, 1320731126, 1320731132, 1320731165, 1320731192,
> 1320731237, 1320731243, 1320731285, 1320731297, 1320731426, 1320731456,
> 1320731828, 1320731843, 1320731855, 1320731894, 1320731909, 1320731936,
> 1320731942, 1320731948, 1320732959, 1320739526, 1320739553, 1320747848,
> 1320747962, 1320752759, 1320757286, 1320774035, 1320774077, 1320780272,
> 1320781529, 1320796800, 1320809246, 1320809390, 1320809468, 1320809621,
> 1320809663, 1320811136, 1320811145, 1320812081, 1320812087, 1320812102,
> 1320812108, 1320812159, 1320812165, 1320812207, 1320812225, 1320812243,
> 1320812273, 1320812294, 1320812312, 1320812327, 1320812387, 1320812396,
> 1320812432, 1320812438, 1320873179, 1320879218, 1320881798, 1320883200,
> 1320883433, 1320886658, 1320889946, 1320893282, 1320893447, 1320904325,
> 1320905744, 1320943689, 1320944409, 1320948294, 1320948366, 1320949248,
> 1320949866, 1320950628, 1320952290, 1320953097, 1320954528, 1320954543,
> 1320954549, 1320958215, 1320961533, 1320969600, 1320972552, 1320973902,
> 1320974547, 1320974931, 1320985044, 1320985257, 1321056000, 1321086297,
> 1321086702, 1321142400, 1321228800, 1321315200, 1321401600, 1321488000,
> 1321574400, 1321660800, 1321683198, 1321684806, 1321693014, 1321694379
> ), class = c("POSIXct", "POSIXt"), tzone = "GMT"), state = c("b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "0", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "0", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "0", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "0", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "0", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "0", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "0", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "0",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "0", "a", "b", "a", "b",
> "a", "b", "0", "a", "b", "0", "0", "0", "0", "0", "0", "0", "a",
> "b", "a", "b"), state_bef = c("0", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "0", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "0",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "0", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "0", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "0", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "0",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "0", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "0", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "0", "a", "b", "a", "b", "a", "b", "0", "a", "b",
> "0", "0", "0", "0", "0", "0", "0", "a", "b", "a"), state_new = c("b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "a",
> "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b", "a", "b",
> "a", "b", "a", "b", "a", "b", "a", "b", "b", "a", "b", "a", "b",
> "a", "b", "b", "a", "b", "b", "b", "0", "0", "0", "0", "0", "a",
> "b", "a", "b")), .Names = c("datetime", "state", "state_bef",
> "state_new"), row.names = 2:291, class = "data.frame")
>
> <zuzanazajk...@ub.edu>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
________________________________
Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny
pouze jeho adresátům.
Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně
jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze
svého systému.
Nejste-li zamýšleným adresátem tohoto emailu, nejste oprávněni tento email
jakkoliv užívat, rozšiřovat, kopírovat či zveřejňovat.
Odesílatel e-mailu neodpovídá za eventuální škodu způsobenou modifikacemi či
zpožděním přenosu e-mailu.
V případě, že je tento e-mail součástí obchodního jednání:
- vyhrazuje si odesílatel právo ukončit kdykoliv jednání o uzavření smlouvy, a
to z jakéhokoliv důvodu i bez uvedení důvodu.
- a obsahuje-li nabídku, je adresát oprávněn nabídku bezodkladně přijmout;
Odesílatel tohoto e-mailu (nabídky) vylučuje přijetí nabídky ze strany příjemce
s dodatkem či odchylkou.
- trvá odesílatel na tom, že příslušná smlouva je uzavřena teprve výslovným
dosažením shody na všech jejích náležitostech.
- odesílatel tohoto emailu informuje, že není oprávněn uzavírat za společnost
žádné smlouvy s výjimkou případů, kdy k tomu byl písemně zmocněn nebo písemně
pověřen a takové pověření nebo plná moc byly adresátovi tohoto emailu případně
osobě, kterou adresát zastupuje, předloženy nebo jejich existence je adresátovi
či osobě jím zastoupené známá.
This e-mail and any documents attached to it may be confidential and are
intended only for its intended recipients.
If you received this e-mail by mistake, please immediately inform its sender.
Delete the contents of this e-mail with all attachments and its copies from
your system.
If you are not the intended recipient of this e-mail, you are not authorized to
use, disseminate, copy or disclose this e-mail in any manner.
The sender of this e-mail shall not be liable for any possible damage caused by
modifications of the e-mail or by delay with transfer of the email.
In case that this e-mail forms part of business dealings:
- the sender reserves the right to end negotiations about entering into a
contract in any time, for any reason, and without stating any reasoning.
- if the e-mail contains an offer, the recipient is entitled to immediately
accept such offer; The sender of this e-mail (offer) excludes any acceptance of
the offer on the part of the recipient containing any amendment or variation.
- the sender insists on that the respective contract is concluded only upon an
express mutual agreement on all its aspects.
- the sender of this e-mail informs that he/she is not authorized to enter into
any contracts on behalf of the company except for cases in which he/she is
expressly authorized to do so in writing, and such authorization or power of
attorney is submitted to the recipient or the person represented by the
recipient, or the existence of such authorization is known to the recipient of
the person represented by the recipient.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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.
