summarise

From dplyr v0.3 by Hadley Wickham

summarise(.data, ...)
summarise_(.data, ..., .dots)
summarize(.data, ...)
summarize_(.data, ..., .dots)

.data: A tbl. All main verbs are S3 generics and provide methods for tbl_df, tbl_dt and tbl_sql.
...: Name-value pairs of summary functions like min(), mean(), max() etc.
.dots: Used to work around non-standard evaluation. See vignette("nse") for details.

An object of the same class as .data. One grouping level will be dropped.

Data frame row names are silently dropped. To preserve, convert to an explicit variable.

summarise(mtcars, mean(disp))
summarise(group_by(mtcars, cyl), mean(disp))

summarise(group_by(mtcars, cyl), m = mean(disp), sd = sd(disp))

Documentation reproduced from package dplyr, version 0.3, License: MIT + file LICENSE

Looks like there are no examples yet.