Memory-mapping is a mechanism that maps a file or a portion of a file on disk to a range of addresses within an application's address space. Use memory-mapping when you want to randomly access large files, or frequently access small files. In addition, memory-mapping lets you access file data using standard MATLAB® indexing operations. For more information, see Overview of Memory-Mapping.
|Create memory map to a file
- Overview of Memory-Mapping
Memory-mapping is a mechanism that maps a portion of a file, or an entire file, on disk to a range of addresses within an application's address space.
- Map File to Memory
Suppose you want to create a memory map for a file named
records.dat, using the
- Read from Mapped File
This example shows how to create two different memory maps, and then read from each of the maps using the appropriate syntax.
- Write to Mapped File
This example shows how to create three different memory maps, and then write to each of the maps using the appropriate syntax.
- Delete Memory Map
To clear a
memmapfileobject from memory, do any of the following:
- Share Memory Between Applications
This example shows how to implement two separate MATLAB processes that communicate with each other by writing and reading from a shared file.