What are some interesting graph analytics you could do on bitcoin blocks? So far I've written some Mathematica to extract transaction data from blockchain.info's API and grouped all of the interactions from within the same block. There are some interesting patterns, like if you look for the largest interaction networks (e.g. those involving more than 100 individual wallets) you see these kinds of really thin funnels between two highly connected groups.
Oh hey you were in the mod[] division parabola thread. How did you get so good with Mathematica? I torrented it a couple weeks ago but its taking me a while to get good with it
Mason Butler
I don't consider myself particularly good but I just practiced a lot through various challenges, homework, projects, and questions on Veeky Forums believe it or not. Been using it since summer of last year for just about everything. The official documentation is extremely helpful.
Anthony Reyes
Did you make that with it? I didn't know you could do animations.
what i've been doing (and you probably already know this) is to input the data set and just see what it suggests. It's not usually exhaustive but there are often cool math tricks I hadn't thought of using there I'm been playing with the prime number functions built in and I'm on a fourier analysis kick right now
Asher Hughes
That's pretty cool. Is that some kind of Z transform thing? What's your major, or what do you do?
How would you even model a PDE like this? I've always wanted to know how to model things like this but the barrier was learning a language in order to implement it
Ryder Murphy
Also, quick Mathematica question. I have a list 10^6 long and I want to zoom in on the 600k-800k region. Is there a way to do this with ListPlot?
Can you figure out which wallets are exchanges and track the flow of bitcoins to and from the wallets?
Michael Ramirez
forgot my dang pic
Ethan Martin
What kind of pattern would be most indicative of an exchange? Someone that sends out bitcoins to a bunch of unique individuals but receives almost nothing? Because I did find one of those.
I could definitely track how many bitcoins a particular wallet sends and receives over the course of a block.
Jaxson Myers
How do I filter certain numbers out of a list? I want to sort by second to last digit, and I have a formula that gets it from the number, but I want to compare the probability of one digit following another
>I want to sort by second to last digit SortBy[yourList, IntegerDigits[#][[-2]]&]
>I want to compare the probability of one digit following another Counts[Flatten[Partition[#,2,1]&@*IntegerDigits/@yourList,1]] I recommend taking this one apart and figuring out what each part is doing.
Christian Evans
>Counts[Flatten[Partition[#,2,1]&@*IntegerDigits/@yourList,1]] Awesome, that works way better than what I had. Thanks
Ian Lee
If you want a nice way to visualize the result, try DiscretePlot3D[Lookup[result, {{n, m}}, 0], {n, 0, 9}, {m, 0, 9}, Filling->Axis, ExtentSize->Full]
