You are jumping the gun (your other email did get through) and you are posting
using HTML (which does not come through on the list). Some time (re)reading the
Posting Guide mentioned at the bottom of all emails on this list seems to be in
order.
The error is actually quite clear. You should return a vector from your
function, not a data frame.
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Sent from my phone. Please excuse my brevity.
On October 29, 2015 4:55:19 PM MST, Axel Urbiz <axel.ur...@gmail.com> wrote:
>Hello,
>
>Sorry, resending this question as the prior was not sent properly.
>
>I’m using the plyr package below to add a variable named "bin" to my
>original data frame "df" with the user-defined function "create_bins".
>I'd
>like to get similar results using dplyr instead, but failing to do so.
>
>set.seed(4)
>df <- data.frame(pred = rnorm(100), models = gl(2, 50, 100, labels =
>c("model1", "model2")))
>
>
>### Using plyr (works fine)
>create_bins <- function(x, nBins)
>{
> Breaks <- unique(quantile(x$pred, probs = seq(0, 1, 1/nBins)))
> dfB <- data.frame(pred = x$pred,
> bin = cut(x$pred, breaks = Breaks, include.lowest =
>TRUE))
> dfB
>}
>
>nBins = 10
>res_plyr <- plyr::ddply(df, plyr::.(models), create_bins, nBins)
>head(res_plyr)
>
>### Using dplyr (fails)
>
>by_group <- dplyr::group_by(df, models)
>res_dplyr <- dplyr::summarize(by_group, create_bins, nBins)
>Error: not a vector
>
>
>Any help would be much appreciated.
>
>Best,
>Axel.
>
> [[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.
