> On Jun 20, 2017, at 7:19 AM, Sorkin, John <jsor...@som.umaryland.edu> wrote:
>
> I am trying to transpose a dataframe by its first column using the by
> statement using the t function. When I use the by function, I get a message,
>
> Error in FUN(X[[i]], ...) : could not find function "FUN"
>
> I don't think I have a syntax error in my by statement because the by
> statment works using the print function.
>
> Data and an executable example follows:
>
> phonydata2 <- structure(list(INTRVNTN = c("CONTROL", "CONTROL", "CONTROL",
> "MPR+NMES+HPRO", "CONTROL", "CONTROL", "CONTROL", "CONTROL",
> "MPR+NMES+HPRO", "MPR+NMES+HPRO", "CONTROL", "CONTROL", "CONTROL",
> "MPR+NMES+HPRO", "MPR+NMES+HPRO", "MPR+NMES+HPRO", "CONTROL",
> "MPR+NMES+HPRO", "MPR+NMES+HPRO", "CONTROL", "MPR+NMES+HPRO",
> "CONTROL", "CONTROL", "MPR+NMES+HPRO", "CONTROL", "CONTROL",
> "CONTROL", "MPR+NMES+HPRO", "CONTROL", "MPR+NMES+HPRO", "MPR+NMES+HPRO",
> "MPR+NMES+HPRO"), HGDOM1_MW1 = c(NA, NA, NA, NA, NA, NA, 17,
> 30, 27.5, 12, 16, 16, 14, NA, 33, NA, 12, 25, NA, NA, 6, NA,
> 13.5, 10, 1, NA, 12, 18, NA, NA, NA, NA), HGDOM1_W1 = c(8, NA,
> NA, 4, NA, NA, 18, NA, 26.5, 22, 14, 8, NA, NA, 33, NA, 15, NA,
> 4, 9, 18, NA, 14, 16, 2, NA, 18, 15, NA, NA, NA, NA)), .Names = c("INTRVNTN",
> "HGDOM1_MW1", "HGDOM1_W1"), class = "data.frame", row.names = c(NA,
> -32L))
>
> phonydata2
>
> # This works
> by(phonydata2[,2:3],phonydata2[,1],print)
> # This gives and error message.
> by(phonydata2[,2:3],phonydata2[,1],t)
It only gives an error message if you redefined `t`. It runs perfectly fine in
there is no data-object in your workspace named `t`.
>
> Thank you,
> John
>
>
>
>
>
>
>
>
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and
> Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>
>
> [[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.
David Winsemius
Alameda, CA, USA
______________________________________________
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.
