Octave packages

[Robert Fong-tom]

I noticed that some functions of the packages listed at http:// 
octave.sourceforge.net/ does not exist in the packages ported from  
MacPorts. Foe example, in octave-financial the function does not  
appear to exist in the MacPorts ported version. However, the MacPorts  
version of octave-image is 0.2.2 while the version at  
octave.sourceforge.net is 0.3.0. Another example is the busdays  
function in the octave-time package. Where can I find  the functions  
available on my system? I would like to check to make sure that these  
functions do not exist on my system.
Bob