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Answers not displaying symbolic results?

John D'Errico on 13 Sep 2024 (Edited on 13 Sep 2024)
Latest activity Reply by Paul on 10 Oct 2024 at 15:37

syms u v
atan2alt(v,u)
ans = 
function Z = atan2alt(V,U)
% extension of atan2(V,U) into the complex plane
Z = -1i*log((U+1i*V)./sqrt(U.^2+V.^2));
% check for purely real input. if so, zero out the imaginary part.
realInputs = (imag(U) == 0) & (imag(V) == 0);
Z(realInputs) = real(Z(realInputs));
end
As I am editing this post, I see the expected symbolic display in the nice form as have grown to love. However, when I save the post, it does not display. (In fact, it shows up here in the discussions post.) This seems to be a new problem, as I have not seen that failure mode in the past.
You can see the problem in this Answer forum response of mine, where it did fail.
https://www.mathworks.com/matlabcentral/answers/2152250-atan2-does-not-accept-complex-numbers-as-input?s_tid=srchtitle

7 Comments

Paul
Paul on 10 Oct 2024 at 15:37
Still a problem. @Tushal Desai
John D'Errico
John D'Errico on 3 Oct 2024 at 11:40
And again, several days later, it had been working fine. But today, broken again.
John D'Errico
John D'Errico on 30 Sep 2024 at 20:10
Darn. It was working too, for a few days. But again, it is broken as of today.
Tushal Desai
Tushal Desai on 23 Sep 2024 at 13:03
Hi @John D'Errico, this is a bug on our end that is preventing symbolic outputs from getting displayed in the outputs. So clearing the cache or changing browsers won't help. We are still investigating to find the root cause to fix it.
John D'Errico
John D'Errico on 22 Sep 2024 at 13:05 (Edited on 22 Sep 2024 at 13:36)
ARGH!
This happens on a daily basis to me.
https://www.mathworks.com/matlabcentral/answers/2154625-how-i-can-show-in-matlab-tha-sqrt-x-2-x-in-symbolic-toolbox?s_tid=srchtitle
And today, even doing as I described did not fix the problem. That is, clear all caches. delete all history. Quit the browser, restart (safari.) Multiple times emptied caches. Then I tried using firefox, so a totally different browser. Nothing fixes it. And it breaks daily, even when eventually it does work.
Even changing browsers did not fix it today. And I've gotten no response from @Tushal Desai
John D'Errico
John D'Errico on 16 Sep 2024 at 1:40
And now it is working. Along the way, I
  1. Restarted
  2. Empty caches
  3. Clear history
But it did finally work.
David
David on 13 Sep 2024
@Tushal Desai

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