On Apr 28, 2006, at 12:00 PM, hzhatlboro wrote:
Could you please refer to User's Guide September 16, 2005 version,
page 86, and give some explanations for the following code:-
for component in substitutionals:
solvent-=component
how is the operation "-" defined for component variables?
The operation is not "-", but "-=". Its meaning is standard in
Python, C, C++, and a lot of other languages and is equivalent to:
solvent = solvent - component
In this case, it refers only to the field variable itself (the
composition), and not any of the attached data (barrier height,
diffusivity, etc.).
It's a way of representing the notion that one component is dependent
on all the others, such that C_N = 1 - \sum_j=1^{N-1} C_j
