Hilbert transform y = hilbert(x,n)

[John B. Thoo]

Hello, everyone.

A friend sent me some code he had written for the "dark side."  When  
I tried to execute it in Octave, I got the error

error: `hilbert' undefined near line 11 column 8
error: evaluating assignment expression near line 11, column 6
error: called from `psidot' in file `/Users/jbthoo/Desktop/ 
NumMethPractice/BurgersHilbert/psidot.m'
error: called from `rk_step' in file `/Users/jbthoo/Desktop/ 
NumMethPractice/BurgersHilbert/rk_step.m'
error: evaluating for command near line 93, column 5
error: evaluating for command near line 91, column 1
error: near line 101 of file `/Users/jbthoo/Desktop/NumMethPractice/ 
BurgersHilbert/run_amp.m'
octave-3.0.5:4>

When I looked in the file "psidot.m", I saw near the beginning the line

hpsi = hilbert(psi,lx);

so I googled "octave hilbert".  This led me to two definitions of  
"hilbert":

<http://sccn.ucsd.edu/pipermail/eeglablist/2006/001257.html>
<http://www.nabble.com/Hilbert-transform-m-file-contribution- 
td9238169.html>

However, both of them define

y = hilbert(x)

of one argument instead of two as called in "psidot.m".

How can I modify either of the two definitions that google returned  
so that I can execute my friend's code?

Thanks.

---John.