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## ubuntu-eol.md

      
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                duaneking
                / ubuntu-eol.md
            
            
              Created
              March 17, 2023 18:04
                — forked from dergachev/ubuntu-eol.md
            
              
                What to do when your ubuntu distro is End-of-Life
              
          
    Let's say you're using Ubuntu 13.04 (Raring Ringtail, released in April 2013) and it just went End-of-Life on you, because it's supported for only 6 months, and the deprecated packages are taken down after 12 months.
You'll probably figure this out the hard way. When you run sudo apt-get update, it will eventually report these errors:
Ign http://archive.ubuntu.com raring-updates/universe Sources/DiffIndex
Err http://security.ubuntu.com raring-security/main Sources
  404  Not Found [IP: 91.189.91.15 80]
Err http://security.ubuntu.com raring-security/universe Sources
  404  Not Found [IP: 91.189.91.15 80]


## vicsek.py
import numpy as np
from tqdm import trange


def get_neighbour_matrix(x, L, R):
    dx = np.subtract.outer(x[:, 0], x[:, 0])
    dy = np.subtract.outer(x[:, 1], x[:, 1])
    dx[dx > (L / 2) ** 2] -= (L / 2) ** 2
    dy[dy > (L / 2) ** 2] -= (L / 2) ** 2
    pair_dist = dx ** 2 + dy ** 2
	import numpy as np
	from tqdm import trange


	def get_neighbour_matrix(x, L, R):
	dx = np.subtract.outer(x[:, 0], x[:, 0])
	dy = np.subtract.outer(x[:, 1], x[:, 1])
	dx[dx > (L / 2) 2] -= (L / 2) 2
	dy[dy > (L / 2) 2] -= (L / 2) 2
	pair_dist = dx 2 + dy 2