python Programming Glossary: rnd

http://stackoverflow.com/questions/13047806/weighted-random-sample-in-python

index i in range n with probability proportional to w_i. rnd random.random sum weights for i w in enumerate weights if w.. if w 0 raise ValueError Negative weight encountered. rnd w if rnd 0 return i raise ValueError Sum of weights is not positive.. w 0 raise ValueError Negative weight encountered. rnd w if rnd 0 return i raise ValueError Sum of weights is not positive to..

selection based on percentage weighting

http://stackoverflow.com/questions/3655430/selection-based-on-percentage-weighting

T this IEnumerable ProportionValue T collection var rnd random.NextDouble foreach var item in collection if rnd item.Proportion.. rnd random.NextDouble foreach var item in collection if rnd item.Proportion return item.Value rnd item.Proportion throw.. in collection if rnd item.Proportion return item.Value rnd item.Proportion throw new InvalidOperationException The proportions..

How do I pass large numpy arrays between python subprocesses without saving to disk?

http://stackoverflow.com/questions/5033799/how-do-i-pass-large-numpy-arrays-between-python-subprocesses-without-saving-to-d

'data' ##Fake data. In real life get data from hardware. rnd np.random.randint 100 print 'rnd 0 '.format rnd arr rnd q.task_done.. get data from hardware. rnd np.random.randint 100 print 'rnd 0 '.format rnd arr rnd q.task_done if __name__ '__main__' N.. hardware. rnd np.random.randint 100 print 'rnd 0 '.format rnd arr rnd q.task_done if __name__ '__main__' N 10 arr shm.zeros..

Probability distribution in Python

http://stackoverflow.com/questions/526255/probability-distribution-in-python

last_sum weight added_weights.append last_sum def choice rnd random.random bis bisect.bisect return items bis added_weights.. bis bisect.bisect return items bis added_weights rnd last_sum 0 return choice I then built a big list of choices..

Select random item with weight

http://stackoverflow.com/questions/9259989/select-random-item-with-weight

w in weights running_total w totals.append running_total rnd random.random running_total for i total in enumerate totals.. running_total for i total in enumerate totals if rnd total return i You can find more details and possible improvements..