Re: [R] Identifying column type
Thanks. Great idea! Sent from my iPhone Beware: My autocorrect is crazy > On Apr 10, 2021, at 1:37 PM, Rui Barradas wrote: > > Hello, > > Maybe something like > > > ok <- sapply(mydata, is.numeric) > mydata <- mydata[ok] > > > to keep the numeric columns only. > > > Hope this helps, > > Rui Barradas > > Às 04:25 de 10/04/21, Steven Yen escreveu: >> I have data of mixed types in a data frame - date and numeric, as shown >> in summary below. How do I identify the column(s) that is/are not >> numeric, in this case, the first. All I want is to identify the >> column(s) and so that I can remove it/them from the data frame Thanks. >>> summary(mydata) >> Date Spot Futures Min. :1997-09-01 00:00:00 Min. : 735.1 Min. : 734.2 >> 1st Qu.:2002-10-16 12:00:00 1st Qu.:1120.7 1st Qu.:1122.6 Median >> :2007-12-01 00:00:00 Median :1301.8 Median :1303.2 Mean :2007-12-01 >> 06:01:27 Mean :1423.1 Mean :1423.6 3rd Qu.:2013-01-16 12:00:00 3rd >> Qu.:1540.0 3rd Qu.:1546.5 Max. :2018-03-01 00:00:00 Max. :2823.8 Max. >> :2825.8 >>[[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. __ 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.
Re: [R] Identifying column type
Hello, Maybe something like ok <- sapply(mydata, is.numeric) mydata <- mydata[ok] to keep the numeric columns only. Hope this helps, Rui Barradas Às 04:25 de 10/04/21, Steven Yen escreveu: I have data of mixed types in a data frame - date and numeric, as shown in summary below. How do I identify the column(s) that is/are not numeric, in this case, the first. All I want is to identify the column(s) and so that I can remove it/them from the data frame Thanks. summary(mydata) Date Spot Futures Min. :1997-09-01 00:00:00 Min. : 735.1 Min. : 734.2 1st Qu.:2002-10-16 12:00:00 1st Qu.:1120.7 1st Qu.:1122.6 Median :2007-12-01 00:00:00 Median :1301.8 Median :1303.2 Mean :2007-12-01 06:01:27 Mean :1423.1 Mean :1423.6 3rd Qu.:2013-01-16 12:00:00 3rd Qu.:1540.0 3rd Qu.:1546.5 Max. :2018-03-01 00:00:00 Max. :2823.8 Max. :2825.8 [[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. __ 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.
Re: [R] Identifying column type
Thanks much! Yes it does. I will read. On 2021/4/10 上午 11:33, Jeff Newmiller wrote: Does sapply( mydata, inherits, what = "POSIXt" ) give you any ideas? On April 9, 2021 8:25:36 PM PDT, Steven Yen wrote: I have data of mixed types in a data frame - date and numeric, as shown in summary below. How do I identify the column(s) that is/are not numeric, in this case, the first. All I want is to identify the column(s) and so that I can remove it/them from the data frame Thanks. summary(mydata) Date Spot Futures Min. :1997-09-01 00:00:00 Min. : 735.1 Min. : 734.2 1st Qu.:2002-10-16 12:00:00 1st Qu.:1120.7 1st Qu.:1122.6 Median :2007-12-01 00:00:00 Median :1301.8 Median :1303.2 Mean :2007-12-01 06:01:27 Mean :1423.1 Mean :1423.6 3rd Qu.:2013-01-16 12:00:00 3rd Qu.:1540.0 3rd Qu.:1546.5 Max. :2018-03-01 00:00:00 Max. :2823.8 Max. :2825.8 [[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. __ 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.
Re: [R] Identifying column type
Does sapply( mydata, inherits, what = "POSIXt" ) give you any ideas? On April 9, 2021 8:25:36 PM PDT, Steven Yen wrote: >I have data of mixed types in a data frame - date and numeric, as shown > >in summary below. How do I identify the column(s) that is/are not >numeric, in this case, the first. All I want is to identify the >column(s) and so that I can remove it/them from the data frame Thanks. > >> summary(mydata) > >Date Spot Futures Min. :1997-09-01 00:00:00 Min. : 735.1 Min. : 734.2 >1st Qu.:2002-10-16 12:00:00 1st Qu.:1120.7 1st Qu.:1122.6 Median >:2007-12-01 00:00:00 Median :1301.8 Median :1303.2 Mean :2007-12-01 >06:01:27 Mean :1423.1 Mean :1423.6 3rd Qu.:2013-01-16 12:00:00 3rd >Qu.:1540.0 3rd Qu.:1546.5 Max. :2018-03-01 00:00:00 Max. :2823.8 Max. >:2825.8 > > > [[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. -- Sent from my phone. Please excuse my brevity. __ 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.
[R] Identifying column type
I have data of mixed types in a data frame - date and numeric, as shown in summary below. How do I identify the column(s) that is/are not numeric, in this case, the first. All I want is to identify the column(s) and so that I can remove it/them from the data frame Thanks. > summary(mydata) Date Spot Futures Min. :1997-09-01 00:00:00 Min. : 735.1 Min. : 734.2 1st Qu.:2002-10-16 12:00:00 1st Qu.:1120.7 1st Qu.:1122.6 Median :2007-12-01 00:00:00 Median :1301.8 Median :1303.2 Mean :2007-12-01 06:01:27 Mean :1423.1 Mean :1423.6 3rd Qu.:2013-01-16 12:00:00 3rd Qu.:1540.0 3rd Qu.:1546.5 Max. :2018-03-01 00:00:00 Max. :2823.8 Max. :2825.8 [[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.
