| alias {SparkR} | R Documentation |
Returns a new SparkDataFrame or a Column with an alias set. Equivalent to SQL "AS" keyword.
## S4 method for signature 'Column' alias(object, data) ## S4 method for signature 'SparkDataFrame' alias(object, data)
object |
x a SparkDataFrame or a Column |
data |
new name to use |
a SparkDataFrame or a Column
alias(Column) since 1.4.0
alias(SparkDataFrame) since 2.3.0
Other colum_func:
between(),
cast(),
endsWith(),
otherwise(),
over(),
startsWith(),
substr()
Other SparkDataFrame functions:
SparkDataFrame-class,
agg(),
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(),
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()
## Not run:
##D df <- createDataFrame(iris)
##D
##D head(select(
##D df, alias(df$Sepal_Length, "slength"), alias(df$Petal_Length, "plength")
##D ))
## End(Not run)
## Not run:
##D df <- alias(createDataFrame(mtcars), "mtcars")
##D avg_mpg <- alias(agg(groupBy(df, df$cyl), avg(df$mpg)), "avg_mpg")
##D
##D head(select(df, column("mtcars.mpg")))
##D head(join(df, avg_mpg, column("mtcars.cyl") == column("avg_mpg.cyl")))
## End(Not run)