Storing decomposition object for future use

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Jayabrata Dhar
Jayabrata Dhar 2019-12-6
评论： Walter Roberson 2020-1-23
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.

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回答（1 个）

Jyothis Gireesh
Jyothis Gireesh 2020-1-23
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!!
  2 个评论
Jayabrata Dhar
Jayabrata Dhar 2020-1-23
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
Walter Roberson 2020-1-23
Reading the description, I realized that they are saying that the decomposition object uses pointers. Saving and restoring pointers is always dubious.

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