OptimizeHyperparameters option not recognized in R2016a

Hello there!

I am trying to follow this example:

https://es.mathworks.com/help/stats/fitcecoc.html#bvdn4xq-1

But it seems the OptimizeHyperparameters option is not recognized. I am using Matlab R2016a in Linux (Ubuntu 14.04).

Any help will be very appreciated!

Answer 1

[Alan Weiss]

As the release notes state, Bayesian optimization was introduced in R2016b. You'll have to upgrade to use this functionality.

Alan Weiss

MATLAB mathematical toolbox documentation

[Ignacio Arganda-Carreras]

Thanks for your answer, Alan! The example page says "Introduced in R2014b" so that piece of information misled me.

[Alan Weiss]

I understand why you were confused. fitcecoc was indeed introduced in R2014b, but the optimization functionality was introduced in R2016b. I don't know how we could make it clearer; every release there is a chance that we change functionality. So we write release notes, but they are a lot to slog through.

If you have any ideas on how we could make this clearer, please let me know.

Alan Weiss

MATLAB mathematical toolbox documentation

[Walter Roberson]

Alan:

I was recently glancing at documentation for a different manufacturer, in which each page said "This was last updated in ..."

Each page could potentially have a link to release notes concerning changes. Also, each new feature could potentially, in the feature line summary or property/values description, have an indication of the release it was added on.

[Alan Weiss]

Walter, I appreciate your thoughts, but still don't have any clarity on how similar issues could be avoided. As you know very well, the underlying math libraries evolve with time, so numerical calculations can have small differences that can accumulate in iterative calculations and yield different answers. This is not the same as a different feature, but isn't all that different, either.

What I mean is, it is hard to say when a feature is changed, because it can work differently each release even when nothing in the code for the feature changes.

That said, I agree that maybe we should put in reverse links from the documentation to the release notes when a feature is changed, as this one was. I will discuss this idea with my colleagues.

Alan Weiss

MATLAB mathematical toolbox documentation

[Walter Roberson]

I think a "This keyword / parameter was added in ..." would help, even without links to the release notes.

As a separate matter, it might also be useful to have a button to click to see all the reverse notes for a topic, even if that was just done as a "query the package release notes for mention of this routine", like

https://www.mathworks.com/help/matlab/release-notes.html?rntext=FUNCTIONNAME&startrelease=R14SP2&endrelease=R2016b&groupby=release&sortby=descending&searchHighlight=FUNCTIONNAME

except directing to the correct Toolboxes's release notes (and available versions.)

On a related note: I not infrequently look at a topic and then want to review the equivalent page for a previous release. There is no direct way to do that. I have to head over to the Archived Documentation page, select the toolbox, drill down to the alphabetical function list, and select the function. In theory to then review the same page for a different release I have to go back to the Archived Documentation page again and drill back down. In practice I usually URL hack the release name in, which works for some releases but there have been at least two major reorganizations of the help pages so that is not reliable. It would be useful if each page had a direct mechanism to review the equivalent page in previous versions.

... and while I am at it ;-)

Some of the pages that do not have to do with toolbox functions change and there is no versioning available for them. One example is the Support Packages (e.g., Arduino): every time I need to figure out which MATLAB release supported what for those, I either have to consult my own previous responses about those, or I have to dig in to the File Exchange. There is a different example outside of the Support Packages that I hit even more often, but unfortunately it is not coming to mind at the moment.

[Walter Roberson]

An example of information that is not versioned but should be is https://www.mathworks.com/hardware-support/arduino-simulink.html which talks about (among other things) which Arduino devices support external mode.