News

Version 0.8

FEATURES / CHANGES

• Update references point to DeltaRho (0.8.6)
• Fix for compatibility with data.table (0.8.6)
• Add control option to makeExtractable() (0.8.5)
• Add several new documentation examples (0.8.4)
• Update removeData() method for local disk connections (0.8.4)
• Remove Spark back-end files (0.8.3)
• Updates to get CRAN-ready (0.8.3)
• Provide information about the key when an error occurs when applying a transformation (0.8.1)
• Improve documentation for a variety of functions, including the addition of examples (0.8.0)
• Add drLM() recombination method for fitting linear models (0.8.0)
• Update versioning scheme to x.y.z (0.8.0)

FIXES

• Update unit test thresholds to be upheld on systems without long double (0.8.5)
• Fig bug in variable preservation for multiple successive divides (0.8.3)
• Fix bug in printing summaries for in-memory ddfs with variables with 10k+ unique levels (0.8.2)
• Add workaround for current RHIPE bug with combRbind() (0.8.0)

Version 0.7.6

FEATURES / CHANGES

• clarify and improve documentation for numerous functions
• add combDdf() recombination method
• add 'by' argument to drHexbin
• update logic of how kvApply() handles output
• update drAggregate() so first argument is data to be consistent
• several documentation cleanup updates
• add kvPair() method for specifying a key-value pair
• improve environment handling in local disk back end
• more friendly error messages when HDFS connection is empty
• many more HDFS unit tests
• add drPersist() method to make transformations persistent
• add overwrite parameter to convert methods
• add handling of character outputs to default to input connection for convenience in swapping out back ends
• add to_ddf() for converting dplyr grouped tbls to ddfs
• allow explicit specificaiton of ranges for drQuantile() and drHexbin()

FIXES

• improve error handling in drJoin() to validate that input data sources are ddo's
• improve logic for dealing with NULL values in key-value pairs
• fix loading of RHIPE and modifying RHIPE regex
• make keys in drRead.table more unique
• more meaningful error messages for drHexbin and drQuantile when dealing with transforms
• fix bug in addTransform dealing with new kvApply behavior
• fix to namespace rbindlist in MapReduce code
• fixes in how global variables are found in transformations
• fix drHexbin to work without needing to pass s4 object to MapReduce
• many improvements and fixes to HDFS back end
• clean up several files and fix some check NOTEs
• fix localDisk MapReduce to properly handle NULL reduce
• fix bug in drRead.table() not overwriting output for local disk case
• fix globals to not search in "imports" environments
• fix some bugs in drQuantile()
• improve error messages for kvApply with keys and values as inputs
• improve error message in local disk MapReduce when there is no data after map
• fix bug in divide() filtering on conditioning variables
• fix bug where a ddo could be mistaken for a ddf after running a MR job

Version 0.7.5

• reintroduce SparkR support, leveraging several updates to SparkR that allow for loading / persisting RDDs on disk, lookup by key, etc.
• general code formatting changes
• change _rh_meta to _meta
• remove strict dependency on parallel package
• several small changes to help R CMD check

Version 0.7.4

FEATURES / CHANGES

• allow by argument in drQuantile() and drAggregate() to be a vector of column names
• add output ability to drAggregate for returning a ddf when by is specified
• change MapReduce logic to return ddf when the value is a data frame
• add faster data frame specific divide method for conditioning division

BUG FIXES

• fix bug in finding file endings in drRead.table() for reading local files
• fix passing of overwrite parameter when using local drRead.table()
• fix bug in passing scientific numbers for rhipe_map_buff_size in drRead.table() with RHIPE / Hadoop backend
• fix bug when conditioning on more than one variable the key can get extra spaces from numeric conditioning variables
• fix proper reduce setting for drRead.table() for HDFS
• fix indexing in divide map

Version 0.7.3

FEATURES / CHANGES

• add addTransform() method to specify transformations to be applied to ddo/ddf objects with deferred evaluation (see https://github.com/delta-rho/datadr/issues/24 for more information)
• revamp drGetGlobals() to properly traverse environments of user-defined transformation functions and find all global variables and all package dependencies
• refine printing of ddo/ddf objects (was getting too verbose)
• add packages argument to MapReduce-inducing functions to allow manual specification of package dependencies required by user defined transformations
• add ability to set options(defaultLocalDiskControl = ...), etc. so that you do not always need to specify control= in all MapReduce-inducing operations
• add print method for key-value pairs to show things nicely, particularly when the object is a ddf, only show top rows of value
• add labels "key" and "value" to key-value pairs
• update drGLM() and drBLB() methods to work with new transformation approach
• add kvPair() and classes for making dealing with key-value pairs a bit more aesthetic

Reference manual