Here is a good place to find some math related cheat sheets.
Here is a fine place to get any cheat sheet you could want. Programming, math... just about everything.
Wednesday, October 20, 2010
Friday, October 15, 2010
Wednesday, October 13, 2010
GSL - GNU Scientific Library
Tuesday, October 12, 2010
Monday, October 11, 2010
Friday, October 8, 2010
Microsoft fonts in Ubuntu
Here is a good tutorial for loading the traditional Microsoft fonts into Ubuntu.
Thursday, October 7, 2010
Variance
Different programs implement variance in different ways. This can lead to confusing results when you move from one set of functions to another.
scipy.stats.cov() normalizes by (N-1), by default, bias=False. By setting bias=True, you will normalize by N.
However, scipy.var() normalizes by N.
In Octave, var( x, 0 ) biases by N-1, and var( x, 1 ) biases by N.
Matlab and R, I think, do things slightly differently.
scipy.stats.cov() normalizes by (N-1), by default, bias=False. By setting bias=True, you will normalize by N.
However, scipy.var() normalizes by N.
In Octave, var( x, 0 ) biases by N-1, and var( x, 1 ) biases by N.
Matlab and R, I think, do things slightly differently.
Friday, October 1, 2010
NumPy and Input/Output
Super dooper resource for NUmPy I/O can be found here. Includes information on how to interpret binary data, and use the NumPy alias of the the MATLAB fread() function.
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