[PD] anyone using array quantile?

[Miller Puckette]

Aha and bngo!  In effect - array random is only looking at the lower 1/2
of the distribution.  I made a stupid C data type fumble in the code.

I recently tripped over a bug, too, in "text set" - will attempt to fix them
both and issue an updated pd-0.45 in the next day or 2.

Thanks for flagging this!

Miller

On Fri, Nov 22, 2013 at 03:56:54PM +0000, peiman khosravi wrote:
> Thanks. In this case I think something isn't right with [array random].
> Using the same array, I get very different patterns with the two methods
> (see attached patch). The difference is obvious with a gaussian
> distribution, which looks skewed when generated with [array random].
> 
> Best,
> Peiman
> 
> 
> 
> 
> 
> 
> 
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> 
> On 22 November 2013 15:48, Miller Puckette <msp at ucsd.edu> wrote:
> 
> > There could be something wrong.  But array_random_bang() (in x_array.c)
> > cooks up a pseudorandom number from 0 to 1 (I believe) and then calls
> > array_quantile_float() with it.  That's exactly what connecting random()
> > to array_quantile in a patch should be doing.
> >
> > cheers
> > Miller
> >
> > On Fri, Nov 22, 2013 at 09:38:59AM +0000, peiman khosravi wrote:
> > > Thank you very much. That does the trick.
> > >
> > > Though, [array random] doesn't seem to be working as I expected. Am I
> > right
> > > to think that it should produce the same result as [array quantile] fed
> > > with uniformly distributed random values? If so I'm getting very
> > different
> > > results here.
> > >
> > > Thanks
> > > Peiman
> > >
> > >
> > >
> > >
> > > *www.peimankhosravi.co.uk <http://www.peimankhosravi.co.uk> || RSS Feed
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> > >
> > >
> > > On 22 November 2013 04:16, Miller Puckette <msp at ucsd.edu> wrote:
> > >
> > > > I think the patch is occasionally (once every 512 times on average)
> > sending
> > > > zero to "array quantile" which then outputs the index of the first
> > nonzero
> > > > number in the table -- in this case a point with probability about
> > 1e-45.
> > > >
> > > > Maybe try random 1e8 (or so) and divide by 1e8 to get a more
> > continuous,
> > > > less grainy random sample out of the array.
> > > >
> > > > cheers
> > > > Miller
> > > >
> > > > On Fri, Nov 22, 2013 at 01:51:19AM +0000, peiman khosravi wrote:
> > > > > Hello,
> > > > >
> > > > > Has anyone got any experience with [array quantile]?
> > > > >
> > > > > I'm getting some strange results and I've done everything I can
> > think of.
> > > > >
> > > > > I've attached a patch that should clarify the problem. Basically,
> > > > > sometimes, not always, [array quantile] returns some weird numbers
> > that I
> > > > > can't explain.
> > > > >
> > > > > And a related issue: array random doesn't seem to be doing what it
> > should
> > > > > be doing. It returns very different values, compared with quantile
> > fed
> > > > with
> > > > > random values between 0 and 1. Again, there is an example of what I
> > mean
> > > > in
> > > > > the attached patch.
> > > > >
> > > > > Thanks
> > > > > Peiman
> > > > >
> > > > >
> > > > > *www.peimankhosravi.co.uk <http://www.peimankhosravi.co.uk> || RSS
> > Feed
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> > > >
> > > >
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