This function provides a lower-level API for calling Arrow functions by their
string function name. You won't use it directly for most applications.
Many Arrow compute functions are mapped to R methods,
and in a dplyr evaluation context, all Arrow functions
are callable with an arrow_ prefix.
call_function( function_name, ..., args = list(...), options = empty_named_list() )
| function_name | string Arrow compute function name |
|---|---|
| ... | Function arguments, which may include |
| args | list arguments as an alternative to specifying in |
| options | named list of C++ function options. |
An Array, ChunkedArray, Scalar, RecordBatch, or Table, whatever the compute function results in.
When passing indices in ..., args, or options, express them as
0-based integers (consistent with C++).
Arrow C++ documentation for the functions and their respective options.
a <- Array$create(c(1L, 2L, 3L, NA, 5L)) s <- Scalar$create(4L) call_function("coalesce", a, s) #> Array #> <int32> #> [ #> 1, #> 2, #> 3, #> 4, #> 5 #> ] a <- Array$create(rnorm(10000)) call_function("quantile", a, options = list(q = seq(0, 1, 0.25))) #> Array #> <double> #> [ #> -3.3041822296584606, #> -0.675501909840726, #> 0.0011218985985251336, #> 0.674597899120164, #> 3.5889486327287328 #> ]