Infer nanoarrow schema from a Polars object
Description
Infer nanoarrow schema from a Polars object
Usage
## S3 method for class 'RPolarsDataFrame'
infer_nanoarrow_schema(x, ..., future = FALSE)
# S3 method for class 'RPolarsSeries'
infer_nanoarrow_schema(x, ..., future = FALSE)
Arguments
x
|
A polars object |
…
|
Ignored |
future
|
Setting this to TRUE will write Polars’ internal data
structures that might not be available by other Arrow implementations.
This functionality is considered unstable. It may be
changed at any point without it being considered a breaking change.
|
Examples
library(polars)
library(nanoarrow)
pl_df = as_polars_df(mtcars)$select("mpg", "cyl")
pl_s = as_polars_series(letters)
infer_nanoarrow_schema(pl_df)
#> <nanoarrow_schema struct>
#> $ format : chr "+s"
#> $ name : chr ""
#> $ metadata : list()
#> $ flags : int 0
#> $ children :List of 2
#> ..$ mpg:<nanoarrow_schema double>
#> .. ..$ format : chr "g"
#> .. ..$ name : chr "mpg"
#> .. ..$ metadata : list()
#> .. ..$ flags : int 2
#> .. ..$ children : list()
#> .. ..$ dictionary: NULL
#> ..$ cyl:<nanoarrow_schema double>
#> .. ..$ format : chr "g"
#> .. ..$ name : chr "cyl"
#> .. ..$ metadata : list()
#> .. ..$ flags : int 2
#> .. ..$ children : list()
#> .. ..$ dictionary: NULL
#> $ dictionary: NULL
#> <nanoarrow_schema large_string>
#> $ format : chr "U"
#> $ name : chr ""
#> $ metadata : list()
#> $ flags : int 0
#> $ children : list()
#> $ dictionary: NULL