random list of numbers 0 and 1

hello,
i am trying to get a list containing the numbers 0 and 1.
the list length should be variable (slider-controlled, approx 200). the distribution of the "zeroes" and the "ones" should be random, start with a majority of "zeroes" and end with a majority of "ones".

the increase of the "ones", should be contollable, ideally by something like a graph mapper (bezier type).

i made some attempts with random and jitter, but could not get any good results. any idea would be appreciated.

Replies to This Discussion

Permalink Reply by Fred Becquelin on January 12, 2016 at 8:34am

Jitter should be the way... Is this it?

Permalink Reply by roberto gagliano on January 12, 2016 at 9:08am

thanks for the quick response !

your solution is very similar to the one i tried and i that i´m not happy with.

in simple words it has two halves, the lower half contains the "zeroes" and the upper half contains the "ones". the jittering moves items from one half to the other. by tweaking the jittering amount one can symmetrically inrease this "swap", but this gives poor control of where the swapping starts and ends and how rapidly it increases and decreases. if you crank the "jitter-slider" up to 0.5 the "zeroes" and "ones" are nearly equally spread over the whole range.

i am thinking of a graph mapper-like control to "mix" the two figures in a more sophisticated way ...

Permalink Reply by Fred Becquelin on January 12, 2016 at 9:05am

A more controlable way, using a bell probability distribution. It allows you to shift the "center".

It's not perfect but that's the idea...

Attachments:

Jitter Gauss.gh, 16 KB

Permalink Reply by roberto gagliano on January 12, 2016 at 9:16am

wow, you´re very quick. it´ll take me some time to figure out your definition ...

Permalink Reply by Fred Becquelin on January 12, 2016 at 9:25am

1 generate a list of N random numbers Xi

2 if this number is larger than the probability at this index i, then pick round(Xi)

else pick round(i / n) , i.e. the sorted range

fun stuff!

the formula is wrong, it needs to take N as an input too in place of 100 I think

Permalink Reply by roberto gagliano on January 12, 2016 at 9:35am

hi fred,

great!

i made some quick tests and they look very promising. it will take more time to test it in my complex definition, i will report later. also i am not exactly figuring out,what your pick´n´choose does here.

so far i replaced your gaussian expression by a bezier and a gaussian graph mapper as it gives me some more "graphic" and intuitive approach to the curve.

thanks again!

Attachments:

Jitter_bezier.gh, 23 KB

Permalink Reply by Daniel González Abalde on January 12, 2016 at 9:52am

Perhaps your need is resolved but here another approach.

Attachments:

Rnd01Graph.gh, 12 KB

Permalink Reply by roberto gagliano on January 12, 2016 at 10:23am

thanks daniel !

made a quick test. feels good, too. have to leave the office now, will be back tomorrow to feedback.

good evening r

Permalink Reply by Daniel González Abalde on January 12, 2016 at 10:34am

OK, here a (I think) better approach.

Attachments:

Rnd01Graph2.gh, 19 KB

Permalink Reply by Fred Becquelin on January 12, 2016 at 1:57pm

Yep, that's nice...

Permalink Reply by roberto gagliano on January 13, 2016 at 4:04am

thanks again !

i tested your definition on a hexgrid array and it works well.

it takes some time to figure out how to use the graph, but after all it´´s very useful. maybe i will try to finetune the definition, if i find the time to dig into it and then post it here.

Attachments: