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How can I clear the RAM memory used by MATLAB without closing the window?

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André Brás
André Brás on 28 Nov 2017
Commented: Adhiti Raman on 23 Jul 2018
Hello everybody, I need your help!
I am using MATLAB and the Kinect for Windows to acquire the skeletal data and everything is going fine. However, after a while, I get an error due to insufficient free RAM memory. The acquisition is stopped and I try everything to clear the memory: clear, clear all, clearvars -global, close all, but nothing works - the memory is not cleared and I can't acquire more data.
Can anybody tell me a command to clear the RAM memory without closing the window?
Thank for your attention. Best regards.
  2 Comments
Adhiti Raman
Adhiti Raman on 21 Jul 2018
I'm having the same issue. Did either one of you find out how to fix this?

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Accepted Answer

Jan
Jan on 21 Jul 2018
There are 2 causes for an exhausted RAM:
  1. The code requires more RAM than you have.
  2. There is a memory leak in the code. While this is very rare in Matlab code, it can happen in C code very easily. Posting the used code would help to identify the problem.
In the case 1., the standard solutions are:
  • Install more RAM
  • Use 64 bit versions of Matlab and OS
  • Close other applications
  • Use the smallest suitable data type. If you store a list of data, which has integer values from 0 to 255, using a double requires 8 byte per element, while an uint8 needs 1 byte only.
  • Increase the virtual memory of the operating system
  • But the most powerful solution is point 1: Install more physical RAM. More more more.
For case 2.: We cannot guess the reasons without seeing the code or at least the names and versions of the used libraries and Matlab.
  1 Comment
Adhiti Raman
Adhiti Raman on 23 Jul 2018
In this case, I don't think more RAM was the answer. I have 16 GB RAM, which should have been more than enough. I don't know why the error showed up, but deleting the imaq object with imaqreset before running my code again worked.

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