Persistent Example - Loading Data Only When Needed

Version 1.1.0.0 (7.62 KB) by Jason Nicholson
Working with persistent variables.
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Updated 26 Apr 2018

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This example demonstrates how to use persistent variables when loading data in a function. Doing things this way guarantees that the "data" value in "persistentFunction" is only loaded or changed when necessary.
This is very useful in cases such as:
- "data" is large and loaded from a network location. Network locations are not as fast as locally saved data.
- The data is large and doesn't change much from call to call of "persistentFunction"

Cite As

Jason Nicholson (2026). Persistent Example - Loading Data Only When Needed (https://ch.mathworks.com/matlabcentral/fileexchange/67076-persistent-example-loading-data-only-when-needed), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2006a
Compatible with any release
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Windows macOS Linux
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Version Published Release Notes
1.1.0.0

Better documentation.
Embedding of persistentFunction html still didn't work. Maybe it will work this time.
I had to hack the HTML because Mathworks doesn't render embeded iframe tags correctly. The persistentFunction HTML was put inline in the persistentExample
1.0.0.0