showDF: showDF

In SparkR: R Front End for 'Apache Spark'

Description

Print the first numRows rows of a SparkDataFrame

Usage

showDF(x, ...)

## S4 method for signature 'SparkDataFrame'
showDF(x, numRows = 20, truncate = TRUE, vertical = FALSE)

Arguments

x	a SparkDataFrame.
...	further arguments to be passed to or from other methods.
numRows	the number of rows to print. Defaults to 20.
truncate	whether truncate long strings. If TRUE, strings more than 20 characters will be truncated. However, if set greater than zero, truncates strings longer than truncate characters and all cells will be aligned right.
vertical	whether print output rows vertically (one line per column value).

Note

showDF since 1.4.0

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(), show(), 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)
showDF(df)

## End(Not run)

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