What is prodofsize?

I saw it in the document of cellfun, but it does not seem to exist as an actual function, i.e., it's impossible to call it directly, and there're no official documents describing it. I have read many other answers and could only find it used as the first argument to cellfun. Is it deprecated? Or a hidden little feature in cellfun for some other reasons?

Answer 1

[the cyclist]

It is mentioned in the "Backward Compatibility" section of the documentation of cellfun, although there doesn't seem to be any info about what the prodofsize means as an input argument.

But if you type

help cellfun

at the MATLAB prompt, you'll see a description.