Labview is computing exp(x) incorrectly!

[Fuel Cells 228]

Labview 6.1 computes exp(x) incorrectly. If there is a fix for this problem please let me know ASAP. I hope this isn't what caused the space shuttle to crash.

[Jim_Kring]

Seems to work OK for me.

http://catb.org/~esr/faqs/smart-questions.html#beprecise

Good luck,

-Jim

[mikeporter]

What gives you the idea that it's not working? can you give an example?

Mike...

[Dennis_Knutson]

Great answer. I'm going to have to remember that link.

[Alberto]

I'm going to translate this in italian:http://www.chiark.greenend.org.uk/~sgtatham/bugs.html , found on that site; and include it in the instruction manuals of my applications...

[shoneill]

Maybe you`re having trouble with floating point precision. Try setting inputs and outputs to Extended precision floating point, and see if that fixes it.

This isn`t a mistake in the computation of course, it`s an inherent problem with limited precision data types.

Shane

[Jim_Kring]

Yeah, Eric Raymond has a lot of stuff worth reading.

Check out the rest of his FAQ's: http://catb.org/~esr/faqs/

and his writings:
http://catb.org/~esr/writings/

"The Cathedral and the Bazaar" is one that should definitely be read by anyone who has an interest in Open Source. "The Art of Unix Programming" is another good one.

Cheers,

-Jim