Weird behavior for pagemrdivide matlab 2022b vs 2022a

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I am noticing some strange behaviour when using pagemrdivide. When I run the code below, the Dpage variable contains a lot of NaN, while the Dfor variable computes just fine. I expect these two to be equal, but they are not. Has anyone else encountered this behaviour before?
When I run the same code in matlab 2022a, I don't get this behaviour, it seems to be introduced in 2022b.
F = 300;
D = randn(2,2,F) + 1i*randn(2,2,F);
P = [0 0 1 0
1 0 0 0
0 0 0 1
0 -1 0 0];
P11 = P(1:2,1:2);
P12 = P(1:2,3:4);
P21 = P(3:4,1:2);
P22 = P(3:4,3:4);
Dpage = pagemrdivide(pagemtimes(P11,D) + P12, pagemtimes(P21,D)+P22);
Dfor = zeros(size(D));
for ff = 1 : F
Dfor(:,:,ff) = mrdivide(P11*D(:,:,ff)+P12,P21*D(:,:,ff)+P22);
ans = 600
ans = 0
Heiko Weichelt
Heiko Weichelt on 19 Jan 2023
EBR is online:
As mentioned before, R2022b Update 4, which will be released in a few days, will contain the fix.

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Answers (1)

Adam Danz
Adam Danz on 18 Jan 2023
Edited: Adam Danz on 18 Jan 2023
Be on the lookout for the next update (update 4) to MATLAB R2022b.
3 Ways to check for MATLAB Updates
  1. From MATLAB Desktop, go to the home tab and select the dropdown menu under Help, then select "Check for Updates".
  2. Look for a red bell in the upper right corner of the desktop (it's gray when there are no available updates). Click it.
  3. Check the manual download page, Select "Get Updates" from the "I WANT TO" dropdown menu.
Heiko Weichelt
Heiko Weichelt on 19 Jan 2023
I was not aware of this but GPU code is separate and not my expertise. I'll poke some of my colleagues about it. Thanks.

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