rowwise: Group input by rows
In sctyner/dplyr050: A Grammar of Data Manipulation
Description
Usage
Arguments
Details
Examples
Description
rowwise is used for the results of do when you
create list-variables. It is also useful to support arbitrary
complex operations that need to be applied to each row.
Usage
1
Arguments
data
Input data frame.
Details
Currently rowwise grouping only works with data frames. Its
main impact is to allow you to work with list-variables in
summarise and mutate without having to
use [[1]]. This makes summarise() on a rowwise tbl
effectively equivalent to plyr's ldply.
Examples
1
2
3
df <- expand.grid(x = 1:3, y = 3:1)
df %>% rowwise() %>% do(i = seq(.$x, .$y))
.Last.value %>% summarise(n = length(i))
sctyner/dplyr050 documentation built on May 17, 2019, 2:22 p.m.
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Description Usage Arguments Details Examples
Description
rowwise is used for the results of do when you
create list-variables. It is also useful to support arbitrary
complex operations that need to be applied to each row.
Usage
1 |
Arguments
data |
Input data frame. |
Details
Currently rowwise grouping only works with data frames. Its
main impact is to allow you to work with list-variables in
summarise and mutate without having to
use [[1]]. This makes summarise() on a rowwise tbl
effectively equivalent to plyr's ldply.
Examples
1 2 3 | df <- expand.grid(x = 1:3, y = 3:1)
df %>% rowwise() %>% do(i = seq(.$x, .$y))
.Last.value %>% summarise(n = length(i))
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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