python Programming Glossary: sampling

http://stackoverflow.com/questions/1065945/how-to-reduce-color-palette-with-pil

in that image. My overall goal is to do some basic color sampling. python image colors python imaging library palette share..

How to create a list of random integer vector whose sum is x

http://stackoverflow.com/questions/11380491/how-to-create-a-list-of-random-integer-vector-whose-sum-is-x

exponential distribution . Instead what I'd recommend is sampling from the multinomial distribution . This will treat each index..

How do I convert (or scale) axis values and redefine the tick frequency in matplotlib?

http://stackoverflow.com/questions/1143848/how-do-i-convert-or-scale-axis-values-and-redefine-the-tick-frequency-in-matpl

etc that I want to be displayed having control over the sampling frequency over the range xmin xmax range. Are there any matplotlib..

Python random N lines from large file (no duplicate lines)

http://stackoverflow.com/questions/12279017/python-random-n-lines-from-large-file-no-duplicate-lines

read of all the file up to the last line you are sampling I am surprised that none of the answers up to now mentioned..

Benefits of panda's multiindex?

http://stackoverflow.com/questions/13226029/benefits-of-pandas-multiindex

use DataFrame.groupby without having a MultiIndex to do subsampling cross sections. On the other hand when I have a MultiIndex on.. DataFrame I still need to use DataFrame.groupby to do sub sampling cross sections. So what is a MultiIndex good for apart from..

Fast interpolation of grid data

http://stackoverflow.com/questions/16983843/fast-interpolation-of-grid-data

It's a bit overengineered for my purposes allowing random sampling of the volume data. Is there anything out there that can take.. sequences of coordinate. For example consider the case of sampling along a line that passes through the cube of data xi np.linspace..

resampling, interpolating matrix

http://stackoverflow.com/questions/1851384/resampling-interpolating-matrix

interpolating matrix I'm trying to interpolate some data for.. x except ZeroDivisionError return 1.0 This comes from sampling theory . Essentially I'm attempting to recreate a signal from.. generator share improve this question This is upsampling. See Help with resampling upsampling for some example solutions...

How to read *.wav file in Python?

http://stackoverflow.com/questions/2060628/how-to-read-wav-file-in-python

somefile returns a tuple of two items the first is the sampling rate in samples per second the second is a numpy array with..

Mixing two audio files together with python

http://stackoverflow.com/questions/4039158/mixing-two-audio-files-together-with-python

fs1 fs2 assert enc1 enc2 result 0.5 data1 0.5 data2 If sampling rate fs or encoding enc are different you may need some audio..

How to identify non-photograph or 'uninteresting' images using Python Imaging Library (PIL)

http://stackoverflow.com/questions/5011505/how-to-identify-non-photograph-or-uninteresting-images-using-python-imaging-li

images. My best idea so far is to take a random sampling of pixels and then... do something with them. python python..

Python Uniform Spherical Distribution

http://stackoverflow.com/questions/5408276/python-uniform-spherical-distribution

. In spherical coordinates taking advantage of the sampling rule phi random 0 2pi costheta random 1 1 u random 0 1 theta..

Analyze audio using Fast Fourier Transform

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

N equally spaced frequencies starting at 0. Because your sampling frequency is 44100 samples sec. and the number of points in..

How to extract an arbitrary line of values from a numpy array?

http://stackoverflow.com/questions/7878398/how-to-extract-an-arbitrary-line-of-values-from-a-numpy-array

cubic interpolation. 2 if you just want nearest neighbor sampling then just use indexing directly. As an example of the first..

Detecting if an object from one image is in another image with OpenCV

http://stackoverflow.com/questions/7881133/detecting-if-an-object-from-one-image-is-in-another-image-with-opencv

at all pairs of corners and determining similarity by sampling some points along the line between them. So I have a few questions..

How to edit raw PCM audio data without an audio library?

http://stackoverflow.com/questions/841049/how-to-edit-raw-pcm-audio-data-without-an-audio-library

you need example code feel free to ask. PS Assuming 48kHz sampling rate a video frame at 24 1.001 23.976023976 fps is 2002 audio..

Scipy/Numpy FFT Frequency Analysis

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

signal.size pylab.plot freqs FFT 'x' pylab.show The sampling rate should be 4000 samples 120 seconds 33.34 samples sec. The.. nonsensical. If I multiply the frequencies by 33.34 the sampling frequency then I get peaks at about 8 Hz and 15 Hz which seems.. I think you don't need to do fftshift and you can pass sampling period to fftfreq import scipy import scipy.fftpack import pylab..

Python random.sample with a generator

http://stackoverflow.com/questions/12581437/python-random-sample-with-a-generator

proposed three methods. The results are as follows. Sampling 1000 from 10000 Using iterSample 0.0163 s Using sample_from_iterable.. 0.0098 s Using iter_sample_fast 0.0148 s Sampling 10000 from 100000 Using iterSample 0.1786 s Using sample_from_iterable.. 0.1320 s Using iter_sample_fast 0.1576 s Sampling 100000 from 1000000 Using iterSample 3.2740 s Using sample_from_iterable..

Analyze audio using Fast Fourier Transform

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

these links on the Nyquist Frequency and Nyquist Shannon Sampling Theorem if you are a glutton for punishment and need to know..