arkhe (version 1.10.0)

seek: Search Rows/Columns by Name

Description

Searches rows/columns by name in an array-like object.

Usage

seek_columns(x, ...)
seek_rows(x, ...)
# S4 method for data.frame
seek_rows(x, select = NULL, names = NULL, ...)
# S4 method for matrix
seek_rows(x, select = NULL, names = NULL, ...)
# S4 method for data.frame
seek_columns(x, select = NULL, names = NULL, ...)
# S4 method for matrix
seek_columns(x, select = NULL, names = NULL, ...)

Value

An integer vector or NULL.

Arguments

x

An R object (should be a matrix or a data.frame).

...

Further arguments to be passed to select.

select

A function to be applied to the row/column names (e.g. startsWith()) that returns an integer or logical vector.

names

A character vector of row/column names to look for. Only used if select is NULL.

Author

N. Frerebeau

See Also

Other data preparation tools: append_column(), append_rownames(), assign(), compact(), count(), detect(), discard(), get(), keep()

Examples

## Seek columns
seek_columns(iris, select = startsWith, prefix = "Petal")
seek_columns(iris, names = c("Petal.Length", "Petal.Width"))

## Get columns
x <- get_columns(iris, select = startsWith, prefix = "Petal")
head(x)

x <- get_columns(iris, names = c("Petal.Length", "Petal.Width"))
head(x)