Thank you Michael, I loaded the file and succeeded to make a list of symbols. But now and after evaluating my expression in terms of its elements, how should I assign them different values I want the expression to be calculated for? (see a part of my code above, it may illustrate what I mean) Assigning X[1]=0, results to an attribute error:
AttributeError: SymbolSequence instance has no attribute '__setitem__' -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
