Skip to content

Recompose a data frame into another form

Source: R/recompose.R
recompose.Rd

recompose() takes a data frame and converts it into one of:

  • A tibble

  • A data frame

  • A matrix

  • A sparse matrix (using the Matrix package)

This is an internal function used only by hardhat and recipes.

Usage

recompose(data, ..., composition = "tibble")

Arguments

data

A data frame.

...

These dots are for future extensions and must be empty.

composition

One of:

  • "tibble" to convert to a tibble.

  • "data.frame" to convert to a base data frame.

  • "matrix" to convert to a matrix. All columns must be numeric.

  • "dgCMatrix" to convert to a sparse matrix. All columns must be numeric, and the Matrix package must be installed.

Value

The output type is determined from the composition.

Examples

df <- vctrs::data_frame(x = 1)

recompose(df)
#> # A tibble: 1 × 1
#>       x
#>   <dbl>
#> 1     1
recompose(df, composition = "matrix")
#>      x
#> [1,] 1

# All columns must be numeric to convert to a matrix
df <- vctrs::data_frame(x = 1, y = "a")
try(recompose(df, composition = "matrix"))
#> Error in recompose(df, composition = "matrix") : 
#>   `data` must only contain numeric columns.
#> ℹ This column isn't numeric: "y".