reset

Reset datastore to initial state

Syntax

reset(ds)

Description

reset(ds) resets the datastore specified by ds to the state where no data has been read from it. Resetting allows re-reading from the same datastore.

Examples

Reset Datastore to Initial State

Create a datastore from the sample file, mapredout.mat, which is the output file of the mapreduce function.

ds = datastore('mapredout.mat');

Read the first key-value pair.

T = read(ds);

Reset the datastore to the state where no data has been read from it.

reset(ds)

Input Arguments

ds — Input datastore

datastore

Input datastore. You can use these datastores as input to the reset method.

• MATLAB^® datastores — Datastores created using MATLAB datastore functions. For example, create a datastore for a collection of images using ImageDatastore. For a complete list of datastores, see Select Datastore for File Format or Application.

• Combined or transformed datastores — Datastores created using the combine and transform functions.

• Custom datastores — Datastores created using the custom datastore framework. See Develop Custom Datastore.

Extended Capabilities

Thread-Based Environment

Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

Usage notes and limitations:

• In a thread-based environment, you can use reset only with the following datastores:

  • ImageDatastore objects

  • CombinedDatastore or TransformedDatastore objects you create from ImageDatastore objects by using combine or transform

  You can use reset with other datastores if you have Parallel Computing Toolbox™. To do so, run the function using a process-backed parallel pool instead of using backgroundPool or ThreadPool (use either ProcessPool or ClusterPool).

For more information, see Run MATLAB Functions in Thread-Based Environment.