Arithmetic is different in formula nodes

[jpdrolet]

That must be very old but anyway...

For example, the result of arithmetic operations on uInt8 are coerced to 0-255.

5-10 gives 0

250+10 gives 255

Edit: This is alos true for expression nodes

That is a quite different implementation than the arithmetic nodes, where the results are modulo 255.

5-10 gives 251

250+10 gives 4

[jerseydevil]

Interesting to note, thank you. I also came across another interesting deviance. The Formula Parsing requires ^ for exponent while the Formula Node requires **.

I was trying to be able to read in formulas from files into the formula nodes but it doesn't seem to have a way. Does anyone know of one, or do I have to continue using Eval?

[jpdrolet]

Interesting to note, thank you. I also came across another interesting deviance. The  Formula Parsing requires ^ for exponent while the Formula Node requires **.

I was trying to be able to read in formulas from files into the formula nodes but it doesn't seem to have a way. Does anyone know of one, or do I have to continue using Eval?

5953[/snapback]

Formula nodes can only be modified at edit time. Use Eval.

And the original post also holds for expression nodes.

[Michael Aivaliotis]

Interesting to note, thank you. I also came across another interesting deviance. The  Formula Parsing requires ^ for exponent while the Formula Node requires **.

5953[/snapback]

This is a bug. Originaly (pre-LV6i), the formula node used ^ for exponent. I think in LabVIEW 6i they changed the exponent to ** for the formula node. They forgot to change the Eval node. See attached image of the formula node online help for LabVIEW 51 showing the exponent notation used.