The problem is, I need to be able to calculate like if sign(x) = sign(y) then A else B. And I like to be effektive, so trying to keep things short
After Posting, I exactly figured the workaround of Zhon, that works well of course, since I only need the function for just one value.
If I needed the function often in the script, I might use monitz87`s solution, though I am not sure how to do that in an effective way. I think that could become a bit complex, which makes it only worth to implement, if you need it all the time for a lot of different variables. Still a great solution, also I did not know at all, you could do that. So this Answer was very, very useful
Thanks for the quick and helpful replies!
As far as workarounds go, implementing your own sign expression as a Function is pretty straightforward, although I fully understand how just having sign(x) as a system expression would save you a lot of time