[PD] dealing with large numbers (for rjdj)

IOhannes m zmoelnig zmoelnig at iem.at
Mon Apr 12 09:03:22 CEST 2010

On 2010-04-11 19:07, duncan speakman wrote:
> hi,
> i'm trying to use the gps object in Pd as part of an RjDj scene and
> their forum is down at the moment so i thought i'd look for help
> here...
> so pd has a limit on the size of numbers it can use and i'm looking

well, Pd has no such limit. it's your computer that has.
(Pd could use higher precision maths though, which it currently doesn't)

> for a simple way to break them down, (as i'm using RjDj i have to use
> the vanilla pd so no extra object fun).
> The GPS object apparently sends out numbers to 6 decimal places, (e.g.
> 51.430023) which keeps causing problems in other parts of the patch.
> I have tried removing the integer before the point and multiplying by
> 10000 to give me something manageable. In the above example I would
> expect to get 4300.23 but instead i get something like 4300.23XXXX,
> where are these extra numbers coming from?

most likely they come from floating point numbesr and 2^n
representations. http://en.wikipedia.org/wiki/Floating_point

however, i don't see any particular problem with the "extra" numbers you get


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