show
show.RdIf 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 class 'Column'
show(object)
# S4 method for class 'GroupedData'
show(object)
# S4 method for class 'SparkDataFrame'
show(object)
# S4 method for class 'WindowSpec'
show(object)
# S4 method for class 'StreamingQuery'
show(object)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(),
dapply(),
dapplyCollect(),
describe(),
dim(),
distinct(),
drop(),
dropDuplicates(),
dropna(),
dtypes(),
except(),
exceptAll(),
explain(),
filter(),
first(),
gapply(),
gapplyCollect(),
getNumPartitions(),
group_by(),
head(),
hint(),
histogram(),
insertInto(),
intersect(),
intersectAll(),
isLocal(),
isStreaming(),
join(),
limit(),
localCheckpoint(),
merge(),
mutate(),
ncol(),
nrow(),
persist(),
printSchema(),
randomSplit(),
rbind(),
rename(),
repartition(),
repartitionByRange(),
rollup(),
sample(),
saveAsTable(),
schema(),
select(),
selectExpr(),
showDF(),
storageLevel(),
str(),
subset(),
summary(),
take(),
toJSON(),
union(),
unionAll(),
unionByName(),
unpersist(),
unpivot(),
with(),
withColumn(),
withWatermark(),
write.df(),
write.jdbc(),
write.json(),
write.orc(),
write.parquet(),
write.stream(),
write.text()
Examples
if (FALSE) { # \dontrun{
sparkR.session()
path <- "path/to/file.json"
df <- read.json(path)
show(df)
} # }