Sachin Shanbhag shane5ul

Conda Package Manager

conda is a package manager like pip. However, there are important differences: (i) it is not restricted to python (via PyPI), (ii) has better dependency resolution, and (iii) has excellent environment management capabilities.

This last difference allows us to create isolated environments that can contain different versions of Python and packages, making it easier to manage dependencies and avoid conflicts between packages.

Installing conda

There are two broad ways to get conda. The first involves installing Anaconda which comes with a large number of other packages (7500+) relevant for ML and scientific computing. If you want just the basics then you should get miniconda.

Here is the cheatsheet in Markdown format:

Operation	MATLAB	Python/SymPy
Define symbolic variable	`syms x`	`x = symbols('x')`
	ex: `syms x y z`	ex: `x, y, z = symbols('x y z')`
Differentiation	`diff(f)`	`f.diff()`
	ex: `diff(sin(x))`	ex: `sin(x).diff()`
Partial differentiation	`diff(f,n)`	`f.diff(x,n)`
	ex: `diff(f(x,y),2,1)`	ex: `f(x,y).diff(x,2).diff(y)`

	def drawBox(xlim, ylim):
	"""
	provide xlim = [xmin, xmax] and ylim = [ymin, ymax]
	returns vectors x, y, which when plotted draw a box connecting the endpoints
	"""
	pts = [[xlim[0], ylim[0]], [xlim[1], ylim[0]], [xlim[1], ylim[1]], [xlim[0], ylim[1]], [xlim[0], ylim[0]]]
	x, y = zip(*pts)
	return x, y

	def connectPoints(pts):

	axes.titlesize : 30
	axes.labelsize : 24
	lines.linewidth : 3
	xtick.labelsize : 16
	ytick.labelsize : 16
	legend.fontsize : 14

	# use latex font for mathtext
	mathtext.fontset : cm

	#!/bin/sh
	#
	# pdfsplit [input.pdf] [first_page] [last_page] [output.pdf]
	#
	# Example: pdfsplit big_file.pdf 10 20 pages_ten_to_twenty.pdf
	#
	# written by: Westley Weimer, Wed Mar 19 17:58:09 EDT 2008
	#
	# The trick: ghostscript (gs) will do PDF splitting for you, it's just not
	# obvious and the required defines are not listed in the manual page.

	#!/bin/sh

	# Convert all arguments (assumed SVG) to a TIFF acceptable to PLOS
	# Requires Inkscape and ImageMagick 6.8 (doesn't work with 6.6.9)

	for i in $(ls *.svg \| cut -d. -f1); do
	inkscape --without-gui --export-png="${i}.png" --export-dpi 300 --export-area-drawing ${i}.svg
	convert -compress LZW -alpha remove -trim ${i}.png ${i}.tiff
	mogrify -alpha off -geometry 1000x ${i}.tiff
	rm ${i}.png

	sed 's/\([,.;:]\)\\cite{\([A-Za-z0-9, ]*\)}/ \\cite{\2}\1/g'

	# use script below for Before2After
	# sed 's/\\cite{\([A-Za-z0-9, ]*\)}\([,.;:]\)/\2\\cite{\1}/g'