User:Jarle Pahr/NumPy

http://wiki.scipy.org/NumPy_for_Matlab_Users

http://mathesaurus.sourceforge.net/matlab-numpy.html

https://pypi.python.org/pypi/numpy

http://wiki.scipy.org/Tentative_NumPy_Tutorial

64-bit installers: http://www.lfd.uci.edu/~gohlke/pythonlibs/

http://www.engr.ucsb.edu/~shell/che210d/numpy.pdf

http://physics.nmt.edu/~raymond/software/python_notes/paper003.html

Matrices and arrays

http://pages.physics.cornell.edu/~myers/teaching/ComputationalMethods/python/arrays.html

http://stackoverflow.com/questions/12024820/danger-of-mixing-numpy-matrix-and-array

http://stackoverflow.com/questions/4151128/what-are-the-differences-between-numpy-arrays-and-matrices-which-one-should-i-u

http://stackoverflow.com/questions/3337301/numpy-matrix-to-array

http://www.python-course.eu/matrix_arithmetic.php

http://nbviewer.ipython.org/urls/raw.github.com/jrjohansson/scientific-python-lectures/master/Lecture-2-Numpy.ipynb

http://scienceoss.com/numpy-array-basics/

http://showmedo.com/videotutorials/video?name=10370040&fromSeriesID=1037

Matrices:

• Strictly 2-dimensional
• Use of * results in matrix multiplication
• Element-wise multiplication achieved with multiply()

Arrays:

• Use of * results in element-wise multiplication
• Matrix multiplication achieved with dot()

Array manipulation routines: http://docs.scipy.org/doc/numpy/reference/routines.array-manipulation.html

Commands & Functions

Create new array :

np.array(object)

Example, 3x3 array:

test = np.array([[1,2,3],[4,5,6],[7,8,9]])

Create matrix from array:

matrix = np.matrix(arrayname)

Dimensions of matrix:

matrixname.shape

Matrix indexing:

a = np.mat([[1,2,3],[4,5,6],[7,8,9]]) #create 3x3 matrix
a[1,1] #returns 5

http://docs.scipy.org/doc/numpy/reference/generated/numpy.zeros.html

http://docs.scipy.org/doc/numpy/reference/generated/numpy.resize.html

http://docs.scipy.org/doc/numpy/reference/generated/numpy.concatenate.html

http://docs.scipy.org/doc/numpy/reference/generated/numpy.hstack.html

http://docs.scipy.org/doc/numpy/reference/generated/numpy.matrix.html