Harry Mavroforakis harrymvr
harrymvr
/ log_add.py
Created
November 1, 2012 05:08
Python code to sample from a probability distribution described by the logarithms of the probabilities (log probabilities). Includes code for log sum (log_add)
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| def log_add(x, y): | |
| maximum = max(x,y) | |
| minimum = min(x,y) | |
| if(abs(maximum - minimum) > 30): | |
| # the difference is too small, return the just the maximum | |
| return maximum | |
| return maximum + log(1 + pow(2, minimum - maximum) ,2) |