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Nested equations in ADEL

CorradoN

Hi, 

I want to compute the time elapsed between the falling edge of two signals. I've used cross() to get the time at which each event occurs, and it works. The problem is that when I try to compute the difference between the two, I get the error: *Error* ("difference" 0 t nil ("*Error* difference: can't handle ((.....) -(......)).

Searching in past threads, I found that the issue is related to the nested parenthesis. The problem is that I've tried both using variables, putting cross() function in an output of ADEL, let's  say t1 and t2, and making the difference t1-t2, or writing a single equation: cross(sig1)-cross(sig2), but it looks like the parenthesis are added automatically and I still get the same error. 

Any suggestion? 

I'm using version 6.1.7

Thank you in advance!

Parents
  • Andrew Beckett
    Quite hard to tell you what you’ve done wrong if you don’t post the actual expression! So I can’t really answer that - other than to say that the only issue with nested parentheses is if you have multiple matching parentheses (although I wouldn’t expect the error you’re seeing if that was the case).

    By multiple matching parentheses I mean:

    ((a-b)) ; is bad (two sets around a-b)
    ((a-b)*(c-d)) ; is OK
    ((a-b)*((c-d))) ; is bad (two sets around c-d)

    However, what you’re trying to achieve might be more easily solved by using the delay function in the calculator.

    Regards,

    Andrew.
Reply
  • Andrew Beckett
    Quite hard to tell you what you’ve done wrong if you don’t post the actual expression! So I can’t really answer that - other than to say that the only issue with nested parentheses is if you have multiple matching parentheses (although I wouldn’t expect the error you’re seeing if that was the case).

    By multiple matching parentheses I mean:

    ((a-b)) ; is bad (two sets around a-b)
    ((a-b)*(c-d)) ; is OK
    ((a-b)*((c-d))) ; is bad (two sets around c-d)

    However, what you’re trying to achieve might be more easily solved by using the delay function in the calculator.

    Regards,

    Andrew.
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