"Joel Pendery" <joel.pendery at gmail.com> wrote in message news:56597268-3472-4fd9-a829-6d9cf51cf093 at e7g2000yqf.googlegroups.com... >> y_diff = y_diff-H > > Syntaxerror: Non-ASCII character '\x96' in file on line 70, but no > encoding declared. That's likely an en-dash, not a minus sign.