python Programming Glossary: freqs

Python - Is a dictionary slow to find frequency of each character?

http://stackoverflow.com/questions/2522152/python-is-a-dictionary-slow-to-find-frequency-of-each-character

O n complexity. My algorithm looks like s len text P 1.0 s freqs for char in text try freqs char P except freqs char P but I.. looks like s len text P 1.0 s freqs for char in text try freqs char P except freqs char P but I doubt that this dictionary.. P 1.0 s freqs for char in text try freqs char P except freqs char P but I doubt that this dictionary method is fast enough..

Memory Efficient Alternatives to Python Dictionaries

http://stackoverflow.com/questions/327223/memory-efficient-alternatives-to-python-dictionaries

measured as RSS from running ps where d is a dict keys and freqs are lists and a b c freq are the fields of a trigram record.. int freq 203156 d a b c int freq 189132 keys.append a b c freqs.append int freq 146132 d intern a intern b intern c int freq.. c int freq 68756 keys.append intern a intern b intern c freqs.append int freq 60320 keys.append a ' ' b ' ' c freqs.append..

how to extract frequency associated with fft values in python

http://stackoverflow.com/questions/3694918/how-to-extract-frequency-associated-with-fft-values-in-python

numpy as np x np.array 1 2 1 0 1 2 1 0 w np.fft.fft x freqs np.fft.fftfreq len x for coef freq in zip w freqs if coef print.. x freqs np.fft.fftfreq len x for coef freq in zip w freqs if coef print ' c 6 exp 2 pi i t f '.format c coef f freq #.. n data_size data data np.array data w np.fft.fft data freqs np.fft.fftfreq len w print freqs.min freqs.max # 0.5 0.499975..

item frequency count in python

http://stackoverflow.com/questions/893417/item-frequency-count-in-python

apple strawberry banana lemon uniques set words.split freqs item words.split.count item for item in uniques print freqs.. item words.split.count item for item in uniques print freqs But I find this code not very good because this way program..

Scipy/Numpy FFT Frequency Analysis

http://stackoverflow.com/questions/9456037/scipy-numpy-fft-frequency-analysis

t FFT abs scipy.fft signal FFT scipy.fftpack.fftshift FFT freqs scipy.fftpack.fftfreq signal.size pylab.plot freqs FFT 'x' pylab.show.. FFT freqs scipy.fftpack.fftfreq signal.size pylab.plot freqs FFT 'x' pylab.show The sampling rate should be 4000 samples.. len t signal acc t FFT abs scipy.fft signal freqs scipy.fftpack.fftfreq signal.size t 1 t 0 pylab.subplot 211..