BYOND 326

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BYOND 326

ID:136216 Mar 19 2003, 3:08 pm
RaeKwon	Where can I download this again? 334 is making me mad now. It's bugging everything, making stats NaN / M NaN RaeKwon

Mar 19 2003, 3:19 pm
Garthor	NaN means it's not a number. For example, if you have 1/0 you get that (or a runtime error, I forget). Or, if you have the square root of a negative number.

Mar 19 2003, 3:43 pm In response to Garthor
RaeKwon	Garthor wrote: NaN means it's not a number. For example, if you have 1/0 you get that (or a runtime error, I forget). Or, if you have the square root of a negative number. How would I correct this? It happened spontaneously after months and months of hosting, and never had this problem before. it's contagious, also :S RaeKwon

Mar 19 2003, 3:46 pm In response to RaeKwon
Garthor	Are you using square roots or really, really, really big numbers anywhere?

Mar 19 2003, 10:07 pm In response to Garthor
RaeKwon	Garthor wrote: Are you using square roots or really, really, really big numbers anywhere? Max it 200 mill, highest number used that is. RaeKwon

Mar 20 2003, 2:52 am In response to RaeKwon
Alathon	RaeKwon wrote: Max it 200 mill, highest number used that is. RaeKwon Are you dividing by 0, or performing any kind of mathematical operation thats not allowed? That will produce NaN, in any version of BYOND.

Mar 20 2003, 4:52 am In response to Alathon
Mellifluous	A question... What is NaN? --Lee

Mar 20 2003, 4:54 am In response to Mellifluous
Alathon	Mellifluous wrote: A question... What is NaN? --Lee [link]

Mar 20 2003, 4:56 am In response to Alathon
Mellifluous	Thanks Alathon, must have read over that a little too fast >:D --Lee

Mar 20 2003, 5:57 am

In response to RaeKwon

Lummox JR

RaeKwon wrote:

Garthor wrote:

Are you using square roots or really, really, really big numbers anywhere?

Max it 200 mill, highest number used that is.

Bear in mind that BYOND's numerical precision isn't high enough to give you even ±1 accuracy at that range. BYOND uses standard floating point math, which means its precision isn't exact or even what you might hope it would be. I believe standard floating-point gives a 24-bit mantissa (at best), which means your best accuracy around 200,000,000 is 200,000,000/2²⁴, about ±11.

Likely the problem you're having is simply that one of your procs is overestimating BYOND's ability to do math at the range of the numbers you've given it.

Lummox JR

Mar 20 2003, 1:37 pm In response to Garthor
Jp	but the square root of a negative number x is xi, isn't it? So the root of -2 is 2i?

Mar 20 2003, 1:39 pm In response to Jp
Garthor	Computers can't handle complex math. Yes, sqrt(-2) is 2i, but if you are going to be working with complex numbers, then you'll need to use strings instead of numerical values.

Mar 20 2003, 3:13 pm In response to Jp
Theodis	Jp wrote: So the root of -2 is 2i? Nope it's 1.4142135623730950488016887242097... * i. Well the decimal numbers go on and on since root 2 is irrational. But the square root of 2 definantly isn't 2.

Mar 20 2003, 3:15 pm In response to Theodis
Garthor	Oops, you're right. sqrt(-4) is 2i.

Mar 21 2003, 10:13 pm
Muska	I got version 317 if you want it..... Muska