The random seed function

Forum Attachments

Summary:

A funny trick I discovered when experimenting with my +CE.

The random seed function

CloudVariable 18 Oct 2018 16:24

My latest coding project involves neural networks, and I was trying to visualize my output using an algorithm that uses random numbers. In the process, I wondered what the graph output would be of a random number seed vs the first random number generated. Here a basic code which stores the x value to the seed, and then plots a point (x,10rand). The graph appears to oscillate similar to a sawtooth wave, but isn’t really a function because it appears there is more than one y value for every x value. I am still trying to figure out why, but they seem to be in phase. Anybody have any light to shed on this?
:ClrDraw
:For(A,0,1000
:A->rand
:Pt-On(A,10rand
:End
This is meant to be run with a window range of Xmin=0, Xmax=1000, Xscl=1, Ymin=-10, Yscl=1, Ymax=10.

Re: The random seed function

OneLetterShor 18 Oct 2018 16:50

That looks cool.

Re: The random seed function

Deoxal 18 Oct 2018 21:26

Obviously there isn't actually multiple outputs for a single input, but the rand command's algorithm, has a cyclical nature that causes it jump up and down for inputs close together, but trend downwards for certain ranges of inputs, thus giving it the appearance of a saw tooth wave. I zoomed in on what you did here using lists and stat plot type 2 and it looks like this and this

---

4920616D204261746D616E

Last edited on 30 Oct 2018 23:14 by Deoxal Show more

Re: The random seed function

CloudVariable 18 Oct 2018 21:36

Ha! That’s exactly what I just did, and that’s why I just checked the thread and saw this. Thanks for trying it though. I actually just managed to write and successfully run a working algorithm for predicting the next random number generated if given the seed (usually 0) and the previous random number output, I will post it soon.