formula node: "integer type required"

[marcoadf]

Hi all.

I'm having a small problem. It seems so easy but I can't reach there...:p

I'm just doing this formula in the formula node:

Y=10^((0.001-32.44-(20*log(2400))+X)/20);

where X is the input and Y the output. Of course that the result won't be a integer, but how can I solve this one?

Thanks

[Dennis_Knutson]

An integer type is required when you do a '^' operation. That's a bit exclusive or. If you really are trying to do exponentiation, use the '**' operator.

[marcoadf]

Right. Is that the problem.

But I do the same with:

pow(10,((0.001-32.44-(20*log(2400))+X)/20); right?

Thaks

[Dennis_Knutson]

You can do Y=10**((0.001-32.44-(20*log(2400))+X)/20); or Y=pow(10,((0.001-32.44-(20*log(2400))+X)/20));

The one you just posted needs another right parantheses.

[NewNewbie]

I'm getting the same error. However, my formula is very simple. I'm just starting to learn to use labview and i was trying to get the idea of how the formula node works, i cant figure out this error though.

[jasonhill]

Try x**2+x+2 per Dennis' first suggestion.

[SparX]

Hy! I am a rookie and i have a kind of a problem with the formula node ... same as others here is the ecuation: "x^y=z;" and i recevie this error: "FORMULA NODE: integer type required". I try do do it with x**y=z but i get this error: "FORMULA NODE: Missing semicolon". I am new with this program ... so take it slow ... THX 🙂

[Yamaeda]

@SparX In your first formula you end with ";" in the second it's missing, could that be it?

/Y

[SparX]

I forgot to put it in the last post .. but is not missing from formula node:

Message Edited by SparX on 01-09-2009 05:09 AM

[yenknip]

You need to turn your expression around, so it's in the form of output = function of inputs

In your case, z=x**y;