python Programming Glossary: frequencies

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

any nice algorithms that give me back a histogram list of frequencies in the same format as the argument weights instead of a sequence..

matplotlib tick axis notation with superscript

http://stackoverflow.com/questions/16529038/matplotlib-tick-axis-notation-with-superscript

superscript I would like to produce some plot over the frequencies. I want to have an x axis with superscript notation like in..

How do I iterate through the alphabet in Python?

http://stackoverflow.com/questions/228730/how-do-i-iterate-through-the-alphabet-in-python

import defaultdict def letterOccurrances string frequencies defaultdict lambda 0 for character in string frequencies character.lower.. frequencies defaultdict lambda 0 for character in string frequencies character.lower 1 return frequencies Use like so occs letterOccurrances.. character in string frequencies character.lower 1 return frequencies Use like so occs letterOccurrances Hello world print occs 'l'..

Simple implementation of N-Gram, tf-idf and Cosine similarity in Python

http://stackoverflow.com/questions/2380394/simple-implementation-of-n-gram-tf-idf-and-cosine-similarity-in-python

i fieldname if tfv rec terms tfv.getTerms frequencies tfv.getTermFrequencies for t f x in zip terms frequencies xrange.. frequencies tfv.getTermFrequencies for t f x in zip terms frequencies xrange maxtokensperdoc df searcher.docFreq Term fieldname t..

SQLite, python, unicode, and non-utf data

http://stackoverflow.com/questions/2392732/sqlite-python-unicode-and-non-utf-data

encoding which needed to be deduced based on letter frequencies in the human language the files were written in. share improve..

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

utf8_codecvt_facet f.imbue utf8_locale count characters frequencies typedef std tr1 unordered_map wchar_t size_t hashtable_t hashtable_t..

How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII

http://stackoverflow.com/questions/4198804/how-to-reliably-guess-the-encoding-between-macroman-cp1252-latin1-utf-8-and

or cp1252. Statistical approach Count character NOT byte frequencies in the data you know to be UTF 8. Determine the most frequent..

Analyze audio using Fast Fourier Transform

http://stackoverflow.com/questions/604453/analyze-audio-using-fast-fourier-transform

the frequency content of your signal at N equally spaced frequencies starting at 0. Because your sampling frequency is 44100 samples.. That is basically the average power level for all frequencies. The rest of your coefficients will count up from 0 in multiples.. Hz until you get to 128. In an FFT you only can measure frequencies up to half your sample points. Read these links on the Nyquist..

Scipy/Numpy FFT Frequency Analysis

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

Hz signal and some random noise. I take the FFT grab the frequencies and plot it. The numbers are pretty nonsensical. If I multiply.. it. The numbers are pretty nonsensical. If I multiply the frequencies by 33.34 the sampling frequency then I get peaks at about 8.. peaks at about 8 Hz and 15 Hz which seems wrong also the frequencies should be a factor of 4 apart not 2 . Any thoughts on what I'm..