Create a RecordBatch

Create a RecordBatch

Usage

record_batch(..., schema = NULL)

Arguments

...

A data.frame or a named set of Arrays or vectors. If given a mixture of data.frames and vectors, the inputs will be autospliced together (see examples). Alternatively, you can provide a single Arrow IPC InputStream, Message, Buffer, or R raw object containing a Buffer.

schema

a Schema, or NULL (the default) to infer the schema from the data in .... When providing an Arrow IPC buffer, schema is required.

Examples

batch <- record_batch(name = rownames(mtcars), mtcars)
dim(batch)
#> [1] 32 12
dim(head(batch))
#> [1]  6 12
names(batch)
#>  [1] "name" "mpg"  "cyl"  "disp" "hp"   "drat" "wt"   "qsec" "vs"   "am"  
#> [11] "gear" "carb"
batch$mpg
#> Array
#> <double>
#> [
#>   21,
#>   21,
#>   22.8,
#>   21.4,
#>   18.7,
#>   18.1,
#>   14.3,
#>   24.4,
#>   22.8,
#>   19.2,
#>   ...
#>   15.2,
#>   13.3,
#>   19.2,
#>   27.3,
#>   26,
#>   30.4,
#>   15.8,
#>   19.7,
#>   15,
#>   21.4
#> ]
batch[["cyl"]]
#> Array
#> <double>
#> [
#>   6,
#>   6,
#>   4,
#>   6,
#>   8,
#>   6,
#>   8,
#>   4,
#>   4,
#>   6,
#>   ...
#>   8,
#>   8,
#>   8,
#>   4,
#>   4,
#>   4,
#>   8,
#>   6,
#>   8,
#>   4
#> ]
as.data.frame(batch[4:8, c("gear", "hp", "wt")])
#>   gear  hp    wt
#> 1    3 110 3.215
#> 2    3 175 3.440
#> 3    3 105 3.460
#> 4    3 245 3.570
#> 5    4  62 3.190