galactromeda / androidfriendly

Android-friendly NumPy and Matplotlib, based on native Python and PyGame.

Android-Friendly NumPy and Matplotlib

version 0.0.1 (07-Sep-2014)

ABOUT

The NumPy and Matplotlib packages are absolutely awesome, and two of my bestest friends. BUT! When compiling code to an Android .pkg using the PyGame subset for Android, they don't quite play nice.

Therefore, this project aims to provide an alternative to NumPy and Matplotlib that is both slower and worse than the originals, but that will work on Android. The idea is to re-write the NumPy functions in pure Python, and to employ PyGame's graphical amazingness to replace Matplotlib's drawing functions.

AIMS

The (initial) aim is simple: to provide an alternative to all functions used in CancellationTools. But feel free to help out if you see a potential implementation of these modules for other projects as well.

Currently, this means that arrays are usually assumed to be a vector; matrices (vectors of vectors of vectors etc.) are not supported in all functions yet.

USAGE

# try importing android
try:
	import android
except ImportError:
	android = None

# if android could not be imported, we are not on
# android, so we do not have to bother with importing
# android-friendly numpy
if android == None:
	import numpy
else:
	import androidfriendly.numpy as numpy

You can create arrays as you would do using NumPy:

>>> a = numpy.array([1,2,3])
>>> b = numpy.array([3,2,1])

Calculations are the same:

>>> a + b
[4, 4, 4]

>>> a - b
[-2, 0, 2]

>>> a * b
[3, 4, 3]

>>> a / b
[0.3333333333333333, 1.0, 3.0]

>>> a ** b
[1, 4, 3]

And so are comparisons:

>>> a < b
[True, False, False]
>>> a <= b
[True, True, False]
>>> a == b
[False, True, False]
>>> a != b
[True, False, True]
>>> a > b
[False, False, True]
>>> a >= b
[False, True, True]