hoogenm’s gists

hoogenm / gaphviz.txt

Created October 24, 2018 10:26

gaphviz on Jupyter

hoogenm / RD_to_wgs.py

Last active October 21, 2018 20:14

RD coords to wgs84 (see https://publicwiki.deltares.nl/display/OET/Python+convert+coordinates)

	import pyproj

	def RD_to_wgs(x, y):
	rd_projection = pyproj.Proj("+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +towgs84=565.237,50.0087,465.658,-0.406857,0.350733,-1.87035,4.0812 +units=m +no_defs")
	wgs84_projection = pyproj.Proj(proj='latlong',datum='WGS84')

	lat, lon, _ = pyproj.transform(rd_projection, wgs84_projection, x, y, 0.0)
	return [lat, lon]

hoogenm / swish.py

Last active June 30, 2018 08:25

Swish ANN Activation Function (for Keras)

	import keras
	keras.utils.generic_utils.get_custom_objects().update({'swish': keras.layers.Activation(lambda x: keras.backend.sigmoid(x) * x)})

hoogenm / install_gophernotes.sh

Created February 5, 2018 19:08

Setup go and gophernotes (Jupyter go) on Centos/Fedora

	#!/bin/bash
	# For Fedora/Centos/RHEL
	# Install go, add to path, install gophernotes

	GO_VERSION = 1.9.3

	cd ~
	wget https://dl.google.com/go/go${GO_VERSION}.linux-amd64.tar.gz
	tar -xvzf go${GO_VERSION}.linux-amd64.tar.gz
	sudo mv go /usr/local/

hoogenm / vim_color_scheme.md

Created August 23, 2017 09:05

Solve dark blue color(s) in VIM

Add the following line to .vimrc: :color desert

hoogenm / clear-iptables.sh

Created August 16, 2017 11:39

Clear ip tables (and accept)

hoogenm / bluray_backup.sh

Created August 7, 2017 18:41

Shell script to backup a folder on a Blu-ray disc

	#!/bin/bash

	# Script to backup a folder to a Blu-ray medium

	# 1) Change /dev/sr1 (if /dev/sr1 is not [the device name of] your bluray burning device)
	# 2) Change ~/folder_to_backup into you choice of folder to backup (be aware of BR capacity, typically max 25 GiB)
	# 3) Prior to running the script, installation of 'xorriso' is required and probably available in your distro packages

	# Credit goes to Thomas Schmitt for providing a helpful explanation of xorriso.

hoogenm / Mtrix.py

Created August 6, 2017 20:09

Matlab-like Matrix-constructor for Python's sympy

	import sympy as sp

	def Mtrix(matrix_def):
	'''
	Constructs a Sympy Matrix from the string matrix_def that has a Matlab-like syntax:

	E.g.: Mtrix("a b c; d e f; g h i") creates a 3x3 matrix where [a b c], [d e f], [g h i] are the rows.

	Example: Mtrix("0 1/2 7; 3 -4 8; 17/3 4 87")

hoogenm / roman_to_int.py

Created July 9, 2017 15:30

Roman numerals (Roman numbers) to integer (concisely in Python)

	def roman_to_int(roman_string):

	symbol_groups = [{'IV': 4, 'IX': 9, 'XL': 40, 'XC': 90, 'CD': 400, 'CM': 900},
	{'M': 1000,'D': 500 ,'C': 100,'L': 50,'X': 10,'V': 5,'I': 1}]

	result = 0 # initially
	for symbol_group in symbol_groups:
	for symbol, value in symbol_group.items():
	result += roman_string.count(symbol) * value
	roman_string = roman_string.replace(symbol, '')

hoogenm / to_pdf.sh

Last active April 16, 2017 13:34

nbconvert to PDF, with smaller margins and smaller 8pt font (Linux)

	# Script takes one parameter: ipynb source filename WITHOUT the .pynb extension
	# Results in a specialized .pdf version, with smaller margins (wider page) and smaller font size (i.e. more text on a line)
	# Tested with up-to-date jupyter/nbconvert version on April 16th, 2017
	jupyter nbconvert --to latex $1.ipynb
	# -i for inplace substitution, -r for full regex
	sed -r -i 's/documentclass\[11pt\]\{article\}/documentclass[8pt]{extarticle}/' $1.tex
	sed -r -i 's/geometry\{verbose,tmargin=1in,bmargin=1in,lmargin=1in,rmargin=1in}/geometry{verbose,tmargin=0.5in,bmargin=0.5in,lmargin=0.2in,rmargin=0.2in}/' $1.tex
	pdflatex $1
	rm $1.tex; rm $1.out; rm $1.aux; rm $1.log

Marc van den Hoogen hoogenm