mblondel

# Mathieu Blondel, October 2010
# License: BSD 3 clause

import numpy as np
from numpy import linalg

def linear_kernel(x1, x2):
    return np.dot(x1, x2)

def polynomial_kernel(x, y, p=3):

astanin

"""Usage: python matchcolors.py good.jpg bad.jpg save-corrected-as.jpg"""

from scipy.misc import imread, imsave
from scipy import mean, interp, ravel, array
from itertools import izip
import sys

def mkcurve(chan1,chan2):
    "Calculate channel curve by averaging target values."
    fst = lambda p: p[0]

hrldcpr

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

glamp

  o		o		o	
	o		 	x		
o			x	x	x	
			x			o
			x	x	x	o
		x				
				o		o
		o				
						

willolbrys

#!/bin/sh
# btsync service
# Replace with linux users you want to run BTSync clients for
BTSYNC_USERS="mendel"
DAEMON=/usr/bin/btsync

start() {
  for btsuser in $BTSYNC_USERS; do
    HOMEDIR=`getent passwd $btsuser | cut -d: -f6`
    config=$HOMEDIR/.sync/config.json

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

Tho85

Build your own private, encrypted, open-source Dropbox-esque sync folder

Prerequisites:

• One or more clients running a UNIX-like OS. Examples are given for Ubuntu 12.04 LTS, although all software components are available for other platforms as well (e.g. OS X). YMMV
• A cheap Ubuntu 12.04 VPS with storage. I recommend Backupsy, they offer 250GB storage for $5/month. Ask Google for coupon codes.

Software components used:

• Unison for file synchronization
• EncFS for folder encryption

minrk

#!/usr/bin/env python
"""strip outputs from an IPython Notebook

Opens a notebook, strips its output, and writes the outputless version to the original file.

Useful mainly as a git filter or pre-commit hook for users who don't want to track output in VCS.

This does mostly the same thing as the `Clear All Output` command in the notebook UI.

LICENSE: Public Domain

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

bollwyvl

SVG fragment builds for reveal.js

Basic use case

• make an SVG (maybe in inkscape)
  • save it someplace reveal.js can find it (maybe next to your presentation)
  • figure out how to identify them (maybe use named layers)
• in reveal.js/index.html
  • add reveal-svg-fragment.js as a dependency
  • in a <section> of reveal.js markup
• add data-svg-fragment="" to something, e.g.