User:Jarle Pahr/Computation

Notes on computational software and scientific programming:

Concepts

http://figshare.com/articles/Towards_better_practice_for_scientific_computing/745262

Software

http://www.wolframalpha.com/

http://amca01.wordpress.com/2011/08/31/the-best-matlab-alternative/

Comparison of MATLAB, Octave, Freemat and Scilab: http://userpages.umbc.edu/~gobbert/papers/SharmaGobbertTR2010.pdf

GNU Octave

Freemat

Scilab: http://www.scilab.org/

SAGE: http://www.sagemath.org/

See also http://openwetware.org/wiki/MATLAB

Scientific computation using Python

http://mathesaurus.sourceforge.net/

Numpy

Arrays vs. matrixes:

In arrays:

Mathematical operations are element-wise. Matrix multiplication is accomplished with numpy.dot()

Matrixes:

• Must be two-dimensional
• Multiplication and exponentiation are matrix operations.
• Element-wise multiplication is accomplished with numpy.multiply()

asmatrix() converts an array to a matrix. asarray() converts a matrix to an array.

SciPy

Scientific computation module dependent on NumPy

SciPy cookbook: http://www.scipy.org/Cookbook

Membrane computing

http://en.wikipedia.org/wiki/Membrane_computing

http://books.google.no/books?id=XzcGPw9trMsC&pg=PA16&lpg=PA16&dq=Proto+biocompiler&source=bl&ots=xw7d1y880S&sig=yJ9aGlWpJHe5JkvbiXtilZCQdik&hl=no&sa=X&ei=p9vfUZO8IobMtQaIsYH4Bw&ved=0CHcQ6AEwBw#v=onepage&q=Proto%20biocompiler&f=false