| alias {SparkR} | R Documentation |
Returns a new SparkDataFrame or a Column with an alias set. Equivalent to SQL "AS" keyword.
alias
## 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, except,
explain, filter,
first, gapplyCollect,
gapply, getNumPartitions,
group_by, head,
hint, histogram,
insertInto, intersect,
isLocal, isStreaming,
join, limit,
localCheckpoint, merge,
mutate, ncol,
nrow, persist,
printSchema, randomSplit,
rbind, registerTempTable,
rename, repartition,
rollup, sample,
saveAsTable, schema,
selectExpr, select,
showDF, show,
storageLevel, str,
subset, summary,
take, toJSON,
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)