Datastore - MATLAB & Simulink (original) (raw)

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Read large collections of data

The datastore function creates a datastore, which is a repository for collections of data that are too large to fit in memory. A datastore allows you to read and process data stored in multiple files on a disk, a remote location, or a database as a single entity. If the data is too large to fit in memory, you can manage the incremental import of data, create a tall array to work with the data, or use the datastore as an input to mapreduce for further processing. For more information, see Getting Started with Datastore.

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• Getting Started with Datastore
  A datastore is an object for reading a single file or a collection of files or data.
• Select Datastore for File Format or Application
  Choose the right datastore based on the file format of your data or application.
• Read and Analyze Large Tabular Text File
  This example shows how to create a datastore for a large text file containing tabular data, and then read and process the data one block at a time or one file at a time.
• Read and Analyze Image Files
  This example shows how to create a datastore for a collection of images, read the image files, and find the images with the maximum average hue, saturation, and brightness (HSV).
• Read and Analyze MAT-File with Key-Value Data
  This example shows how to create a datastore for key-value pair data in a MAT-file that is the output of mapreduce.
• Read and Analyze Hadoop Sequence File
  This example shows how to create a datastore for a Sequence file containing key-value data.
• Work with Remote Data
  Work with remote data in Amazon S3™, Azure® Blob Storage, or HDFS™.
• Set Up Datastore for Processing on Different Machines or Clusters
  Setup a datastore on your machine that can be loaded and processed on another machine or cluster.
• Develop Custom Datastore
  Create a fully customized datastore for your custom or proprietary data.
• Develop Custom Datastore for DICOM Data
  This example shows how to develop a custom datastore that supports writing operations.
• Testing Guidelines for Custom Datastores
  After implementing your custom datastore, follow this test procedure to qualify your custom datastore.