Storing decomposition object for future use

I used the function decomposition to create a MATLAB decomposition object dA.

dA = decomposition(A)

Since my primary matrix A is same for all simulations even with other parameters, I wish to create dA once (and by once I do not mean not once at the start of every simulation but say once in a lifetime since my matrix A remains exactly same for the present physics) and store it as a .mat file (or any other file system) so that I can re-use it without re-running it for every new simulation. However, MATLAB gives a warning

Warning: Saving a decomposition is not supported.

> In decomposition/saveobj (line 667)

Is there any other round about to save dA and re-load and use it for future use.

Thanks in advance.

Answer 1

[Jyothis Gireesh]

This is a limitation on the decomposition object. Please refer to the following link which addresses a similar issue and offers a possible workaround to the same.

https://www.mathworks.com/matlabcentral/answers/401212-decomposition-object-saveobj-method-not-supported

Hope this helps!!

[Jayabrata Dhar]

Thanks for your reply. However, the workaround is not for decomposition although the explanation why it cannot be saved was new to me. Hopefully, MATLAB will come up with a new file format that can be maintained across various computers to save such matrices which does strongly reduces the simulation and other computation time.

[Walter Roberson]

Reading the description, I realized that they are saying that the decomposition object uses pointers. Saving and restoring pointers is always dubious.