Dear all, I am dealing with the reading of a *.txt file. The txt file the following shape: 103001930 103001580 103001530 1998-10-01 00:00:00 0.6 0 0 1998-10-01 01:00:00 0.2 0.2 0.2 1998-10-01 02:00:00 0.6 0.2 0.4 1998-10-01 03:00:00 0 0 0.6 1998-10-01 04:00:00 0 0 0 1998-10-01 05:00:00 0 0 0 1998-10-01 06:00:00 0 0 0 1998-10-01 07:00:00 0.2 0 0 If it is possible I have a coupe of questions, which will sound stupid but they are important to me in order to understand ho R deal with file or date. 1) Do I have to convert it to a *csv file? 2) Can a deal with space and not "," 3) How can I read date? thanks a lot to all of you, Thanks Diego [[alternative HTML version deleted]]
1) No. 2) The read.csv function is a s special case use of the more general read.table function that can handle any simple field separator. 3) Read the data in as character (I recommend using the stringsAsFactors=FALSE argument to read.table) and convert to an appropriate type from that form. e.g. [1] [1] https://www.r-bloggers.com/using-dates-and-times-in-r/ On July 30, 2018 7:29:05 AM PDT, Diego Avesani <diego.avesani at gmail.com> wrote:>Dear all, > >I am dealing with the reading of a *.txt file. >The txt file the following shape: > >103001930 103001580 103001530 >1998-10-01 00:00:00 0.6 0 0 >1998-10-01 01:00:00 0.2 0.2 0.2 >1998-10-01 02:00:00 0.6 0.2 0.4 >1998-10-01 03:00:00 0 0 0.6 >1998-10-01 04:00:00 0 0 0 >1998-10-01 05:00:00 0 0 0 >1998-10-01 06:00:00 0 0 0 >1998-10-01 07:00:00 0.2 0 0 > >If it is possible I have a coupe of questions, which will sound stupid >but >they are important to me in order to understand ho R deal with file or >date. > >1) Do I have to convert it to a *csv file? >2) Can a deal with space and not "," >3) How can I read date? > >thanks a lot to all of you, >Thanks > > >Diego > > [[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.
Hi Diego,
You may have to do some conversion as you have three fields in the
first line using the default space separator and five fields in
subsequent lines. If the first line doesn't contain any important data
you can just delete it or replace it with a meaningful header line
with five fields and save the file under another name.
It looks as thought you have date-time as two fields. If so, you can
just read the first field if you only want the date:
# assume you have removed the first line
dadf<-read.table("xxx.txt",stringsAsFactors=FALSE
dadf$date<-as.Date(dadf$V1,format="%Y-%m-%d")
If you want the date/time:
dadf$datetime<-strptime(paste(dadf$V1,dadf$V2),format="%Y-%m-%d
%H:%M:%S")
Jim
On Tue, Jul 31, 2018 at 12:29 AM, Diego Avesani <diego.avesani at
gmail.com> wrote:> Dear all,
>
> I am dealing with the reading of a *.txt file.
> The txt file the following shape:
>
> 103001930 103001580 103001530
> 1998-10-01 00:00:00 0.6 0 0
> 1998-10-01 01:00:00 0.2 0.2 0.2
> 1998-10-01 02:00:00 0.6 0.2 0.4
> 1998-10-01 03:00:00 0 0 0.6
> 1998-10-01 04:00:00 0 0 0
> 1998-10-01 05:00:00 0 0 0
> 1998-10-01 06:00:00 0 0 0
> 1998-10-01 07:00:00 0.2 0 0
>
> If it is possible I have a coupe of questions, which will sound stupid but
> they are important to me in order to understand ho R deal with file or
date.
>
> 1) Do I have to convert it to a *csv file?
> 2) Can a deal with space and not ","
> 3) How can I read date?
>
> thanks a lot to all of you,
> Thanks
>
>
> Diego
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Or, without removing the first line
dadf <- read.table("xxx.txt", stringsAsFactors=FALSE, skip=1)
Another alternative,
dadf$datetime <- as.POSIXct(paste(dadf$V1,dadf$V2))
since the dates appear to be in the default format.
(I generally prefer to work with datetimes in POSIXct class rather than POSIXlt
class)
-Don
--
Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
Lab cell 925-724-7509
?On 7/30/18, 4:03 PM, "R-help on behalf of Jim Lemon"
<r-help-bounces at r-project.org on behalf of drjimlemon at gmail.com>
wrote:
Hi Diego,
You may have to do some conversion as you have three fields in the
first line using the default space separator and five fields in
subsequent lines. If the first line doesn't contain any important data
you can just delete it or replace it with a meaningful header line
with five fields and save the file under another name.
It looks as thought you have date-time as two fields. If so, you can
just read the first field if you only want the date:
# assume you have removed the first line
dadf<-read.table("xxx.txt",stringsAsFactors=FALSE
dadf$date<-as.Date(dadf$V1,format="%Y-%m-%d")
If you want the date/time:
dadf$datetime<-strptime(paste(dadf$V1,dadf$V2),format="%Y-%m-%d
%H:%M:%S")
Jim
On Tue, Jul 31, 2018 at 12:29 AM, Diego Avesani <diego.avesani at
gmail.com> wrote:
> Dear all,
>
> I am dealing with the reading of a *.txt file.
> The txt file the following shape:
>
> 103001930 103001580 103001530
> 1998-10-01 00:00:00 0.6 0 0
> 1998-10-01 01:00:00 0.2 0.2 0.2
> 1998-10-01 02:00:00 0.6 0.2 0.4
> 1998-10-01 03:00:00 0 0 0.6
> 1998-10-01 04:00:00 0 0 0
> 1998-10-01 05:00:00 0 0 0
> 1998-10-01 06:00:00 0 0 0
> 1998-10-01 07:00:00 0.2 0 0
>
> If it is possible I have a coupe of questions, which will sound stupid
but
> they are important to me in order to understand ho R deal with file or
date.
>
> 1) Do I have to convert it to a *csv file?
> 2) Can a deal with space and not ","
> 3) How can I read date?
>
> thanks a lot to all of you,
> Thanks
>
>
> Diego
>
> [[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.
______________________________________________
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.