docezyfit displays the start page for the Ezyfit toolbox in the help
browser. In Matlab 7.3 and before (R2006), typing "doc ezyfit" had the
same result. However, since Matlab 7.4 (R2007a), the doc function
changed, and this feature is not available anymore, so you have to
use docezyfit instead.
docezyfit function_name displays the documention of function_name
in the help browser. In Matlab 7.3, this is strictly equivalent to
Published output in the Help browser