Linux environment variable question

[David Aldrich]

Hi

I need to run a function under Octave that requiries two filenames as 
parameters. The parameters must be full paths, but the paths are long, so I 
want to specify part of the path by an environment variable. However, I can't 
get the syntax right. Here is what I do:

$ mypath = 'home/myname' 

$ octave -q --eval "fprintf('%x', RegressionTest($mypath + 'filename1', $mypath 
+ 'filename2'))"

but this gives a syntax error in the path.

What would be correct syntax please?

Best regards

David