| describe {SparkR} | R Documentation |
Computes statistics for numeric and string columns. If no columns are given, this function computes statistics for all numerical or string columns.
describe(x, col, ...) ## S4 method for signature 'SparkDataFrame,character' describe(x, col, ...) ## S4 method for signature 'SparkDataFrame,ANY' describe(x)
x |
a SparkDataFrame to be computed. |
col |
a string of name. |
... |
additional expressions. |
A SparkDataFrame.
describe(SparkDataFrame, character) since 1.4.0
describe(SparkDataFrame) since 1.4.0
See summary for expanded statistics and control over which statistics to compute.
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,
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 sparkR.session()
##D path <- "path/to/file.json"
##D df <- read.json(path)
##D describe(df)
##D describe(df, "col1")
##D describe(df, "col1", "col2")
## End(Not run)