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python Programming Glossary: powWhat is wrong with this python function from “Programming Collective Intelligence”? http://stackoverflow.com/questions/1423525/what-is-wrong-with-this-python-function-from-programming-collective-intelligenc for it in si sum2 sum prefs p2 it for it in si sum1Sq sum pow prefs p1 it 2 for it in si sum2Sq sum pow prefs p2 it 2 for.. in si sum1Sq sum pow prefs p1 it 2 for it in si sum2Sq sum pow prefs p2 it 2 for it in si pSum sum prefs p1 it prefs p2 it.. p2 it for it in si num pSum sum1 sum2 n den sqrt sum1Sq pow sum1 2 n sum2Sq pow sum2 2 n if den 0 return 0 r num den return..
http://stackoverflow.com/questions/14414430/why-0-0-equals-1-in-python IEEE 754 recommends several functions for computing a power. It defines pow 0 0 and pown 0 0 as returning 1 and powr 0.. several functions for computing a power. It defines pow 0 0 and pown 0 0 as returning 1 and powr 0 0 as returning NaN.. functions for computing a power. It defines pow 0 0 and pown 0 0 as returning 1 and powr 0 0 as returning NaN . Most programming..
Which is faster in Python: x**.5 or math.sqrt(x)? http://stackoverflow.com/questions/327002/which-is-faster-in-python-x-5-or-math-sqrtx faster the actual function or simply raising to the half power UPDATE This is not a matter of premature optimization. This.. do a square root in Python math.sqrt the ' ' operator and pow x .5 . I'm just curious as to the differences in the implementation.. When it comes to efficiency which is better His response pow and are equivalent math.sqrt doesn't work for complex numbers..
How to compute the nth root of a very big integer http://stackoverflow.com/questions/356090/how-to-compute-the-nth-root-of-a-very-big-integer compute the nth root of a long integer in Python. I tried pow n 1.0 3 but obviously it doesn't work. Any ideas By long integer.. may be worthwhile. from timeit import Timer def find_invpow x n Finds the integer component of the n'th root of x an integer.. mid n x high mid else return mid return mid 1 def find_invpowAlt x n Finds the integer component of the n'th root of x an..
http://stackoverflow.com/questions/3865939/can-this-python-postfix-notation-reverse-polish-notation-interpreter-be-made-m their functions ARITHMETIC_OPERATORS add sub mul div mod pow floordiv def postfix expression stack Stack operators ARITHMETIC_OPERATORS.. ' ' operator.div ' ' operator.mod ' ' operator.pow ' ' operator.floordiv def postfix expression operators ARITHMETIC_OPERATORS..
http://stackoverflow.com/questions/4114740/negative-pow-in-python pow in python I have this problem import math math.pow 1.07 1.3.. pow in python I have this problem import math math.pow 1.07 1.3 Traceback most recent call last File stdin line 1 in.. ValueError math domain error any suggestion python math pow share improve this question 1.07 1.3 will not be a real..
Using strides for an efficient moving average filter http://stackoverflow.com/questions/4936620/using-strides-for-an-efficient-moving-average-filter for i in range 0 filtsize 1 if i 0 b numpy.roll b pow filtsize 2 1 i 0 filtered numpy.sum b 1 pow filtsize 2 .reshape.. b numpy.roll b pow filtsize 2 1 i 0 filtered numpy.sum b 1 pow filtsize 2 .reshape a.shape 0 a.shape 1 scipy.misc.imsave average.jpg..
How did Python implement the built-in function pow()? http://stackoverflow.com/questions/5246856/how-did-python-implement-the-built-in-function-pow did Python implement the built in function pow I have to write a program to calculate a b c where b and c.. it's really slow. Then I found that the built in function pow can do this really fast by calling pow a b c . I'm curious to.. built in function pow can do this really fast by calling pow a b c . I'm curious to know how does Python implement this Or..
Plot logarithmic axes with matplotlib in python http://stackoverflow.com/questions/773814/plot-logarithmic-axes-with-matplotlib-in-python from pylab import import matplotlib.pyplot as pyplot a pow 10 i for i in range 10 fig pyplot.figure ax fig.add_subplot.. from pylab import import matplotlib.pyplot as pyplot a pow 10 i for i in range 10 fig pyplot.figure ax fig.add_subplot..
Converting integer to string in Python http://stackoverflow.com/questions/961632/converting-integer-to-string-in-python 0 int t n raw_input a a b int i for i in n.split ' ' d pow a b d.str c.append d 0 for j in c print j When I try to convert..
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