[R] how to add a calculated column into a data frame

Jeff Newmiller jdnewm|| @end|ng |rom dcn@d@v|@@c@@u@
Fri Jun 5 07:38:31 CEST 2020

This should get you started:

x <- "2009-03-21"
substr( x, 1, 4 )
y <- as.integer( substr( x, 1, 4 ) )


yy <- as.POSIXlt( x )$year + 1900

RShowDoc( "R-intro" )

On June 4, 2020 9:18:00 PM PDT, Charles Thuo <tcmuigai using gmail.com> wrote:
>Dear  Sirs,
>I have a data frame that has a column that shows the transaction date.
>How do i add another column that  extracts the year of transaction from
>transaction date.
>	[[alternative HTML version deleted]]

Please post in plain text. It will get converted for you if you forget, and the quality of the automatic conversion can be awful.

>R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

Sent from my phone. Please excuse my brevity.

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