Why am I getting these plot warnings?

I am trying to do some simple plotting, plot(diff), and I keep getting these warnings Warning: Error updating Button. Not enough input arguments. at least 50 times before stopping. What Button is it talking about and how do I turn off these warnings?

[Walter Roberson]

Please show your code.

[the cyclist]

I would modify Walter's suggestion slightly, to recommend that you try to simplify your code down to the smallest version that exhibits the problem, and post that code.

In my experience, that process itself often exposes the bug.

Answer 1

[Ellen Braden]

diff is a difference between two arrays, diff = posA(:,1) - posB(:,1). posA and posB are the same size. Then I plot diff, plot(diff). That's it.

[Walter Roberson]

So your code just looks like loading some values into posA and posB, then

diff = posA(:,1) - posB(:,1);
plot(diff)

??

Note: it is not recommended to use diff as the name of a variable, as it is the name of a commonly used function.

Answer 2

[Ellen Braden]

Even if I change it to posdiff = posA(:,1)-posB(:,1), plot(posdiff) I get the same warnings

Answer 3

[Robert Barretto]

I have the same issue with Matlab 2018b. Luckily I can confirm that my code on Matlab 2016b does not produce this problem.

This is true on both Mac and PC.

[Walter Roberson]

I am still waiting to see code.

[Robert Barretto]

no problem....

[Walter Roberson]

Try

restoredefaultpath;
rehash toolboxcache

[Robert Barretto]

Walter that's fantastic:

You were spot on -- once i saw default path -- I knew I had to check my old libraries. Turns out I have a convex optimization library that likes to run it's own nargchk.

http://ask.cvxr.com/t/cvx-setup-error/4053/2

Just removed from path and good to go.

Thanks and happy thanksgiving!

[Ellen Braden]

Worked for me too! Thanks

[Kenny Nona]

this, however, deletes the dependencies to installed libraries such as those installed for speedgoat.

[Walter Roberson]

You would add those in a few at a time until you encountered the problem again, to isolate which one is causing the problem. You would add them at the end of the path instead of at the beginning of the path.

If a library provides its own function with the same name as a MATLAB function, and it does not take care for compatibility, then you pretty much need to edit the library if you want to be to use the library with MATLAB without problems.

[John]

Thank-you Walter Roberson! I suddenly had the same problem. Something crept into my extensive paths. Now I have to reverse engineer and find the culprit in my paths.

Try
restoredefaultpath;
rehash toolboxcache

[Boian Alexandrov]

It worked!

Answer 4

[Stijn Helsen]

I had the same problem, and the provided solution solved my problem.

Thank you!!