"Missing" Functions?

[Brendan Donohue]

Octave Help,
I have recently downloaded the latest version of Octave on to my Macbook
running OSX.  I have been exploring the software a bit and while looking at
several things in the online documentation I noticed that several functions
appear not have been included in the installation.  For example when I type
"help cubic," or "help linear" it says that these are not found.  I am
wondering if there are a whole bunch of functions which I need to download
separately from the basic installation - any suggestions?

Thanks.

Brendan Donohue
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