[PD] cumulative distribution?

pete mcpartlan petemcpartlan at yahoo.co.uk
Wed Nov 9 16:52:27 CET 2005

```thanks Tebjan,

but...its not half a cosine because it has to flatten out at both ends.

and secondly i have no idea how to take an equation like that and
implement that in pd... maybe i didnt explain that i'm not too good at
all that maths stuff...

thanks,

pete

Tebjan Halm wrote:

> >>(cos(x) + 1) * c with x inside the range -Pi to 0 and c is a constant
> >>that defines the output range of the curve 0 to c ...
>
>
> sorry, the output range will be 0 to 2*c ... because the cos range -1
> to 1
> gets shifted upwards by the +1 to 0..2 and c scales this range ...
>
> pete mcpartlan schrieb:
>
>> hello,
>>
>> i need help with a maths problem... i am trying to plot a cumulative
>> distribution curve to weight random. I have a [random] that feeds
>> into a chain of [moses], sililar to the markov chain example but what
>> i want to do is have a table dump into the right inlet of each moses
>> changing the weighting. so far so good. what i need help with is the
>> curve which needs to make it more likely for the next result to be
>> near the  same position. the attatched patch has an array with the
>> sort of function it should be... like an s stetched at both ends...
>> is there a way i can do this with expr? or am i going to have to type
>> out a list for each state? i'm sure this is probably quite a simple
>> maths problem... but beyond me... or other ideas? might it be simpler
>> to have a longer array with the curve is then plotted at different
>> points back into the array... but considering i'm probably going to
>> have 16+ of these and other stuff i want to make it as simple as
>> possible....
>>
>> thanks in advance and apologies for rambling a bit..
>>
>> pete
>>
>
>

--
~~~~~~~~~~~~~~~~~~~~~~~~~
www.140worthing.karoo.net
=-=-=-=-=-=-=-=-=-=-=-=-=

```