CombinedDatastore
Datastore to combine data read from multiple underlying datastores
Description
Use a CombinedDatastore
object to combine the data read from
multiple other datastores.
A CombinedDatastore
maintains parity between the underlying datastores,
so that data is read from corresponding parts of the underlying datastores. Resetting the
CombinedDatastore
resets all of the underlying datastores.
Creation
You can create a CombinedDatastore
object using the combine
function.
For example, dsnew = combine(ds1,ds2)
creates a datastore that combines the
read data from datastores ds1
and ds2
.
Properties
Object Functions
combine | Combine data from multiple datastores |
hasdata | Determine if data is available to read |
preview | Preview subset of data in datastore |
read | Read data in datastore |
readall | Read all data in datastore |
writeall | Write datastore to files |
reset | Reset datastore to initial state |
transform | Transform datastore |
numpartitions | Number of datastore partitions |
partition | Partition a datastore |
shuffle | Shuffle all data in datastore |
isPartitionable | Determine whether datastore is partitionable |
isSubsettable | Determine whether datastore is subsettable |
isShuffleable | Determine whether datastore is shuffleable |
Examples
Version History
Introduced in R2019a