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Ilya Orson IlyaOrson

Working from home
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View mandelbrot-on-all-accelerators.ipynb
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IlyaOrson /
Created Oct 29, 2021 — forked from ChrisRackauckas/
DiffEqFlux.jl (Julia) vs Jax on an Epidemic Model

DiffEqFlux.jl (Julia) vs Jax on an Epidemic Model

The Jax developers optimized a differential equation benchmark in this issue which used DiffEqFlux.jl as a performance baseline. The Julia code from there was updated to include some standard performance tricks and is the benchmark code here. Thus both codes have been optimized by the library developers.


Forward Pass

IlyaOrson / powershell_repl.jl
Created Oct 20, 2021
Powershell mode in Julia's REPL
View powershell_repl.jl
# may go to startup file to make it always available
using ReplMaker
function powershell_command(s)
# adapted from
args = String.(split(s))
if args[1] == "cd"
new_oldpwd = pwd()
if length(args) > 2
throw(ArgumentError("cd method only takes one argument"))
View A hack for showing LaTeX formulas in GitHub


A lot of GitHub projects need to have pretty math formulas in READMEs, wikis or other markdown pages. The desired approach would be to just write inline LaTeX-style formulas like this:

$e^{i \pi} = -1$

Unfortunately, GitHub does not support inline formulas. The issue is tracked here.


IlyaOrson / crp.jl
Created Mar 4, 2020
Chinese restaurant process
View crp.jl
Generate table assignments for 'n' customers,
according to a Chinese Restaurant Process with dispersion parameter 'α'
Returns an array of integer table assignments
function crp(n, α)
@assert n > 0
table_assignments = zeros(Int, n)
table_assignments[1] = 1 # first customer sits at table 1
IlyaOrson / .block
Created Feb 7, 2019 — forked from mbostock/.block
Municipalities of Mexico II
View .block
border: no
height: 600
license: gpl-3.0
"""Provides methods around syncing and usage of AWS s3 buckets as local caches rather than individually
downloading every file"""
import os
import shutil
import boto3 as boto
import multiprocessing
import copy
import hashlib
IlyaOrson /
Created Dec 31, 2018 — forked from jiahao/
Setting up Julia on an Amazon EC2 instance
#Set up data partition
sudo mkdir /data
sudo chmod 777 /data
sudo "echo /dev/xvdb /data ext4 rw,user,exec,comment=cloudconfig 0 2 >> /etc/fstab"
sudo mount /data
#Install build environment
sudo sed -i "s/enabled=0/enabled=1" /etc/yum.repos.d/epel.epo
sudo yum -y update
sudo yum -y upgrade
IlyaOrson /
Created Oct 8, 2017 — forked from karpathy/
Training a Neural Network ATARI Pong agent with Policy Gradients from raw pixels
""" Trains an agent with (stochastic) Policy Gradients on Pong. Uses OpenAI Gym. """
import numpy as np
import cPickle as pickle
import gym
# hyperparameters
H = 200 # number of hidden layer neurons
batch_size = 10 # every how many episodes to do a param update?
learning_rate = 1e-4
gamma = 0.99 # discount factor for reward
IlyaOrson /
Created Jul 17, 2017 — forked from rogerhub/
An implementation of Edmond's Blossom Algorithm.
#!/usr/bin/env python
class Vertex:
def __init__(self, value):
self.value = value
self.edges = {}
def degree(self):
return len(self.edges)
def __str__(self):
return str(self.value)