[R] Converting a Date variable from character to Date

[jim holtman]

Try this by add a "day" to the date field

    library(tidyverse)
    library(lubridate)
    input <- "*Period            CPI*
    2022m1         4994
    2022m2         5336
    2022m3         5671
    2022m4         6532
    2022m5         7973
    2022m6        10365
    2022m7        12673
    2022m8        14356
    2022m9        14708"

    m_data <- read.delim(text = input, sep = "")

    # convert the date by adding a "day" before the conversion

    m_data$date <- ymd(paste0(m_data$X.Period, '-1'))
    m_data

    ##   X.Period  CPI.       date
    ## 1   2022m1  4994 2022-01-01
    ## 2   2022m2  5336 2022-02-01
    ## 3   2022m3  5671 2022-03-01
    ## 4   2022m4  6532 2022-04-01
    ## 5   2022m5  7973 2022-05-01
    ## 6   2022m6 10365 2022-06-01
    ## 7   2022m7 12673 2022-07-01
    ## 8   2022m8 14356 2022-08-01
    ## 9   2022m9 14708 2022-09-01



Thanks

Jim Holtman
*Data Munger Guru*


*What is the problem that you are trying to solve?Tell me what you want to
do, not how you want to do it.*


On Thu, Sep 29, 2022 at 9:36 AM Admire Tarisirayi Chirume <
atchirume using gmail.com> wrote:

> Kindly request assistance to *convert a Date variable from a character to
> be recognized as a date*.
> NB: kindly take note that the data is in a csv file called *inflation*. I
> have included part of the file content herewith with the header for
> assistance.
>
>
> My data looks like this:
> *Period            CPI*
> 2022m1         4994
> 2022m2         5336
> 2022m3         5671
> 2022m4         6532
> 2022m5         7973
> 2022m6        10365
> 2022m7        12673
> 2022m8        14356
> 2022m9        14708
>
>  I used the following command lines.
>
>
> class(inflation.2$cpi)
> inflation.2$cpi <- as.numeric(as.character(inflation.2$cpi))
> *format(as.Date(inflation.2$period), "%Y-%m")*
>
> Having run the command lines above, the variable *period* in the attached
> CSV file remains being read as a character variable. Kindly assist.
>
> Thank you.
>
>
> Alternative email: addtarris using icloud.com/TChirume using rbz.co.zw
> Skype: admirechirume
> Call: +263773369884
> whatsapp: +818099861504
>
>
> On Thu, Sep 29, 2022 at 6:10 PM Jeff Newmiller <jdnewmil using dcn.davis.ca.us>
> wrote:
>
> > Your attachment was stripped by the mailing list. The criteria for
> allowed
> > attachments are a bit tricky to translate into actions to apply to your
> > email software, so usually including part of your file in the body of the
> > email is the most successful approach for communicating your problem. Be
> > sure to use a text editor or the
> >
> >   readLines("filename.csv") |> head() |> dput()
> >
> > functions in R to extract lines of your file for inclusion in the email.
> >
> > On September 29, 2022 8:52:30 AM PDT, Admire Tarisirayi Chirume <
> > atchirume using gmail.com> wrote:
> > >I kindly request for assistance to convert a Date variable from a
> > character
> > >to be recognised as a date. I used the following command lines.
> > >
> > >inflation<-read.csv("Inflation_forecasts_1.csv")
> > >attach(inflation)
> > >inflation[,1:2 ] #subsetting the dataframe
> > >#Renaming variables
> > >inflation<- rename(inflation.df,
> > >                   cpi = CPI,
> > >                   year=period)
> > >
> > >#subsetting data April 2020 to current
> > >inflation.2<-data.frame(inflation[-c(1:135),])
> > >class(inflation.2$cpi)
> > >inflation.2$cpi <- as.numeric(as.character(inflation.2$cpi))
> > >* format(as.Date(inflation.2$period), "%Y-%m")*
> > >
> > >Having ran the command lines above, the variable period in the attached
> > csv
> > >file remains being read as a character variable. Kindly assist.
> > >
> > >Thank you.
> > >______________________________________________
> > >R-help using 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.
> >
>
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>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
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