show: show

In SparkR: R Front End for 'Apache Spark'

Description

If eager evaluation is enabled and the Spark object is a SparkDataFrame, evaluate the SparkDataFrame and print top rows of the SparkDataFrame, otherwise, print the class and type information of the Spark object.

Usage

## S4 method for signature 'Column'
show(object)

## S4 method for signature 'GroupedData'
show(object)

## S4 method for signature 'SparkDataFrame'
show(object)

## S4 method for signature 'WindowSpec'
show(object)

## S4 method for signature 'StreamingQuery'
show(object)

Arguments

object

a Spark object. Can be a SparkDataFrame, Column, GroupedData, WindowSpec.

Note

show(Column) since 1.4.0

show(GroupedData) since 1.4.0

show(SparkDataFrame) since 1.4.0

show(WindowSpec) since 2.0.0

show(StreamingQuery) since 2.2.0

See Also

Other SparkDataFrame functions: SparkDataFrame-class, agg(), alias(), arrange(), as.data.frame(), attach,SparkDataFrame-method, broadcast(), cache(), checkpoint(), coalesce(), collect(), colnames(), coltypes(), createOrReplaceTempView(), crossJoin(), cube(), dapplyCollect(), dapply(), describe(), dim(), distinct(), dropDuplicates(), dropna(), drop(), dtypes(), exceptAll(), except(), explain(), filter(), first(), gapplyCollect(), gapply(), getNumPartitions(), group_by(), head(), hint(), histogram(), insertInto(), intersectAll(), intersect(), isLocal(), isStreaming(), join(), limit(), localCheckpoint(), merge(), mutate(), ncol(), nrow(), persist(), printSchema(), randomSplit(), rbind(), rename(), repartitionByRange(), repartition(), rollup(), sample(), saveAsTable(), schema(), selectExpr(), select(), showDF(), storageLevel(), str(), subset(), summary(), take(), toJSON(), unionAll(), unionByName(), union(), unpersist(), withColumn(), withWatermark(), with(), write.df(), write.jdbc(), write.json(), write.orc(), write.parquet(), write.stream(), write.text()

Examples

## Not run: 
sparkR.session()
path <- "path/to/file.json"
df <- read.json(path)
show(df)

## End(Not run)

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