User:Jarle Pahr/NumPy: Difference between revisions
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Array manipulation routines: http://docs.scipy.org/doc/numpy/reference/routines.array-manipulation.html | Array manipulation routines: http://docs.scipy.org/doc/numpy/reference/routines.array-manipulation.html | ||
http://stackoverflow.com/questions/6999617/how-to-assign-a-string-value-to-an-array-in-numpy | |||
http://stackoverflow.com/questions/9476797/how-do-i-create-character-arrays-in-numpy | |||
=Commands & Functions= | =Commands & Functions= |
Revision as of 15:51, 23 September 2013
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
http://casaguides.nrao.edu/index.php?title=NumpyBasics
Tutorials etc
http://www.iiserpune.ac.in/~farhat/courses/idc205/lab2.pdf
Advanced numpy: http://scipy-lectures.github.io/advanced/advanced_numpy/
Matrices and arrays
http://scipy-lectures.github.io/intro/numpy/array_object.html
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/3337301/numpy-matrix-to-array
Data type objects: http://docs.scipy.org/doc/numpy/reference/arrays.dtypes.html
http://www.python-course.eu/matrix_arithmetic.php
http://scienceoss.com/numpy-array-basics/
http://showmedo.com/videotutorials/video?name=10370040&fromSeriesID=1037
Pretty-printing: http://stackoverflow.com/questions/2891790/pretty-printing-of-numpy-array
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
http://stackoverflow.com/questions/6999617/how-to-assign-a-string-value-to-an-array-in-numpy
http://stackoverflow.com/questions/9476797/how-do-i-create-character-arrays-in-numpy
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
Applications
Gauss-Jordan elimination
http://zeronteproject.tk/contents/content.php?topic=Software&postid=34
http://bender.astro.sunysb.edu/classes/phy688_spring2013/examples/gauss.py