firstby: First row within each group
In basetable: Fast and Memory-Efficient Base R Table Manipulation
firstby R Documentation
First row within each group
Description
First row within each group
Usage
firstby(data, by, order = NULL)
Arguments
data
A data.frame.
by
Character vector of column names identifying groups or join keys.
order
Optional column(s) used to break ties before picking first/last rows.
Value
One row per group.
basetable documentation built on Sept. 18, 2026, 9:13 a.m.
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| firstby | R Documentation |
First row within each group
Description
First row within each group
Usage
firstby(data, by, order = NULL)
Arguments
data |
A data.frame. |
by |
Character vector of column names identifying groups or join keys. |
order |
Optional column(s) used to break ties before picking first/last rows. |
Value
One row per group.
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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