structField: structField

In SparkR: R Front End for 'Apache Spark'

Description

Create a structField object that contains the metadata for a single field in a schema.

Usage

structField(x, ...)

## S3 method for class 'jobj'
structField(x, ...)

## S3 method for class 'character'
structField(x, type, nullable = TRUE, ...)

Arguments

x	the name of the field.
...	additional argument(s) passed to the method.
type	The data type of the field
nullable	A logical vector indicating whether or not the field is nullable

Value

A structField object.

Note

structField since 1.4.0

Examples

## Not run: 
field1 <- structField("a", "integer")
field2 <- structField("c", "string")
field3 <- structField("avg", "double")
schema <- structType(field1, field2, field3)
df1 <- gapply(df, list("a", "c"),
              function(key, x) { y <- data.frame(key, mean(x$b), stringsAsFactors = FALSE) },
              schema)

## End(Not run)

SparkR documentation built on June 3, 2021, 5:05 p.m.