Dear R users,
I know that this question is silly (I am not a R newby) but I already wasted
quite a lot of energies trying to fill in an empty data frame (with
"POSIXct" "POSIXt" data type).
Suppose I create
mydf <- data.frame(data_POSIX=as.POSIXct(NA), value=as.numeric(NA))
day1 <- as.POSIXct("2018-02-01-00-00",
format="%Y-%m-%d-%H-%M", tz="Etc/GMT-1")
day2 <- as.POSIXct("2018-02-02-00-00",
format="%Y-%m-%d-%H-%M", tz="Etc/GMT-1")
then
mydf$data_POSIX <- c(day1, day2)
does not work, it gives me:
"Error in `$<-.data.frame`(`*tmp*`, data_POSIX, value = c(1517439600,
1517612400 :
replacement has 2 rows, data has 1"
There are few basic concepts that I am missing.
Why c(day1, day2) is not a vector?
Why I am not able to populate my data frame?
Could somebody please give me the right hints?
Thank you for your precious help
Stefano
(oo)
--oOO--( )--OOo--------------------------------------
Stefano Sofia PhD
Civil Protection - Marche Region - Italy
Meteo Section
Snow Section
Via del Colle Ameno 5
60126 Torrette di Ancona, Ancona (AN)
Uff: +39 071 806 7743
E-mail: stefano.sofia at regione.marche.it
---Oo---------oO----------------------------------------
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Hi Stefano, my guess is that you're expecting data recycling to apply but your data frame is only one row long... therefore you can't insert a 2-row vector into a 1-row vector. Recycling won't help. You should specify the number of rows that will be required in your data frame using (e.g) rep(). (here I use 10 rows as an example) mydf <- data.frame(data_POSIX=rep(as.POSIXct(NA), 10), value=as.numeric(NA)) Olivier. On Thu, 24 Jun 2021 13:34:31 +0000 Stefano Sofia <stefano.sofia at regione.marche.it> wrote:> Dear R users, > I know that this question is silly (I am not a R newby) but I already > wasted quite a lot of energies trying to fill in an empty data frame > (with "POSIXct" "POSIXt" data type). > > Suppose I create > mydf <- data.frame(data_POSIX=as.POSIXct(NA), value=as.numeric(NA)) > day1 <- as.POSIXct("2018-02-01-00-00", format="%Y-%m-%d-%H-%M", > tz="Etc/GMT-1") day2 <- as.POSIXct("2018-02-02-00-00", > format="%Y-%m-%d-%H-%M", tz="Etc/GMT-1") > > then > mydf$data_POSIX <- c(day1, day2) > > does not work, it gives me: > "Error in `$<-.data.frame`(`*tmp*`, data_POSIX, value = c(1517439600, > 1517612400 : replacement has 2 rows, data has 1" > > There are few basic concepts that I am missing. > Why c(day1, day2) is not a vector? > Why I am not able to populate my data frame? > > Could somebody please give me the right hints? > Thank you for your precious help > Stefano > > > (oo) > --oOO--( )--OOo-------------------------------------- > Stefano Sofia PhD > Civil Protection - Marche Region - Italy > Meteo Section > Snow Section > Via del Colle Ameno 5 > 60126 Torrette di Ancona, Ancona (AN) > Uff: +39 071 806 7743 > E-mail: stefano.sofia at regione.marche.it > ---Oo---------oO---------------------------------------- > > ________________________________ > > AVVISO IMPORTANTE: Questo messaggio di posta elettronica pu? > contenere informazioni confidenziali, pertanto ? destinato solo a > persone autorizzate alla ricezione. I messaggi di posta elettronica > per i client di Regione Marche possono contenere informazioni > confidenziali e con privilegi legali. Se non si ? il destinatario > specificato, non leggere, copiare, inoltrare o archiviare questo > messaggio. Se si ? ricevuto questo messaggio per errore, inoltrarlo > al mittente ed eliminarlo completamente dal sistema del proprio > computer. Ai sensi dell?art. 6 della DGR n. 1394/2008 si segnala che, > in caso di necessit? ed urgenza, la risposta al presente messaggio di > posta elettronica pu? essere visionata da persone estranee al > destinatario. IMPORTANT NOTICE: This e-mail message is intended to be > received only by persons entitled to receive the confidential > information it may contain. E-mail messages to clients of Regione > Marche may contain information that is confidential and legally > privileged. Please do not read, copy, forward, or store this message > unless you are an intended recipient of it. If you have received this > message in error, please forward it to the sender and delete it > completely from your computer system. > > -- > Questo messaggio stato analizzato da Libraesva ESG ed risultato non > infetto. This message was scanned by Libraesva ESG and is believed to > be clean. > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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.-- Olivier Crouzet, PhD http://olivier.ghostinthemachine.space /Ma?tre de Conf?rences/ @LLING - Laboratoire de Linguistique de Nantes UMR6310 CNRS / Universit? de Nantes
1) It _is_ a vector. Why do you think it is not a vector? 2) Your data frame has one row, with an NA in the date_POSIX column. You cannot fit a vector of length 2 as a column into a data frame with only 1 row. What are you trying to do? Do you really want to end up with a 2-row data frame or a 3 row data frame? On June 24, 2021 6:34:31 AM PDT, Stefano Sofia <stefano.sofia at regione.marche.it> wrote:>Dear R users, >I know that this question is silly (I am not a R newby) but I already >wasted quite a lot of energies trying to fill in an empty data frame >(with "POSIXct" "POSIXt" data type). > >Suppose I create >mydf <- data.frame(data_POSIX=as.POSIXct(NA), value=as.numeric(NA)) >day1 <- as.POSIXct("2018-02-01-00-00", format="%Y-%m-%d-%H-%M", >tz="Etc/GMT-1") >day2 <- as.POSIXct("2018-02-02-00-00", format="%Y-%m-%d-%H-%M", >tz="Etc/GMT-1") > >then >mydf$data_POSIX <- c(day1, day2) > >does not work, it gives me: >"Error in `$<-.data.frame`(`*tmp*`, data_POSIX, value = c(1517439600, >1517612400 : > replacement has 2 rows, data has 1" > >There are few basic concepts that I am missing. >Why c(day1, day2) is not a vector? >Why I am not able to populate my data frame? > >Could somebody please give me the right hints? >Thank you for your precious help >Stefano > > > (oo) >--oOO--( )--OOo-------------------------------------- >Stefano Sofia PhD >Civil Protection - Marche Region - Italy >Meteo Section >Snow Section >Via del Colle Ameno 5 >60126 Torrette di Ancona, Ancona (AN) >Uff: +39 071 806 7743 >E-mail: stefano.sofia at regione.marche.it >---Oo---------oO---------------------------------------- > >________________________________ > >AVVISO IMPORTANTE: Questo messaggio di posta elettronica pu? contenere >informazioni confidenziali, pertanto ? destinato solo a persone >autorizzate alla ricezione. I messaggi di posta elettronica per i >client di Regione Marche possono contenere informazioni confidenziali e >con privilegi legali. Se non si ? il destinatario specificato, non >leggere, copiare, inoltrare o archiviare questo messaggio. Se si ? >ricevuto questo messaggio per errore, inoltrarlo al mittente ed >eliminarlo completamente dal sistema del proprio computer. Ai sensi >dell?art. 6 della DGR n. 1394/2008 si segnala che, in caso di necessit? >ed urgenza, la risposta al presente messaggio di posta elettronica pu? >essere visionata da persone estranee al destinatario. >IMPORTANT NOTICE: This e-mail message is intended to be received only >by persons entitled to receive the confidential information it may >contain. E-mail messages to clients of Regione Marche may contain >information that is confidential and legally privileged. Please do not >read, copy, forward, or store this message unless you are an intended >recipient of it. If you have received this message in error, please >forward it to the sender and delete it completely from your computer >system. > >-- >Questo messaggio stato analizzato da Libraesva ESG ed risultato non >infetto. >This message was scanned by Libraesva ESG and is believed to be clean. > > > [[alternative HTML version deleted]] > >______________________________________________ >R-help at 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.-- Sent from my phone. Please excuse my brevity.