summarise {m61r}

Summarise formula on groups

Description

Summarise of formulas on a data.frame.

Usage

summarise_(df, group = NULL, ...)

Arguments

df

data.frame

group

formula that describes the group

...

formulas to be generated

Value

summarise_() returns a data frame. If argument group is not NULL, output get its first columns called according to the names present in argument group. The following columns are called according to the name of each argument present in .... Each row corresponds to processed expressions determined in ... for each group determined in group, or over the whole data frame if group is NULL.

Examples

  summarise_(CO2,a=~mean(uptake),b=~sd(uptake))

  summarise_(CO2, group=~c(Type,Treatment),a=~mean(uptake),b=~sd(uptake))