How can I check since which Matlab version a function exists?

Question

It was impossible in 2007, but is there now a way to check which Matlab versions a function exists for?

For example, in Wolfram Mathematica, the documentation indica

Answer 1

Have a look to the FEX function when.

Answer 2

I'd go to the release-notes page for some useful information.

For example.

http://www.mathworks.com/help/releases/R2013b/stats/release-notes.html

Then do a search in web page.

Hope this helps.