python Programming Glossary: coefficient

http://stackoverflow.com/questions/12311148/print-number-in-engineering-format

by the context. If the number is a finite number then The coefficient is first converted to a string in base ten using the characters.. exponent plus the number of characters in the converted coefficient less one. That is exponent clength 1 where clength is the length.. is exponent clength 1 where clength is the length of the coefficient in decimal digits. If the exponent is less than or equal to..

How to set up and solve simultaneous equations in python

http://stackoverflow.com/questions/14367331/how-to-set-up-and-solve-simultaneous-equations-in-python

x is N_max ... N_0 M_max ... M_1 . Then I build up the A coefficient matrix from 4 block matrices. Here's a snapshot for the example.. for the example case n 50 showing how you can derive the coefficient matrix and understand the block structure. The coefficient matrix.. coefficient matrix and understand the block structure. The coefficient matrix A is light blue the constant right side is orange. The..

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

tells you the frequencies associated with the coefficients import numpy as np x np.array 1 2 1 0 1 2 1 0 w np.fft.fft.. file test.wav . Now we read in the data FFT it find the coefficient with maximum power and find the corresponding fft frequency.. freqs.min freqs.max # 0.5 0.499975 # Find the peak in the coefficients idx np.argmax np.abs w 2 freq freqs idx freq_in_hertz abs freq..

Calculating Pearson correlation and significance in Python

http://stackoverflow.com/questions/3949226/calculating-pearson-correlation-and-significance-in-python

pearsonr x y Calculates a Pearson correlation coefficient and the p value for testing non correlation. The Pearson correlation.. value for testing non correlation. The Pearson correlation coefficient measures the linear relationship between two datasets. Strictly.. dataset be normally distributed. Like other correlation coefficients this one varies between 1 and 1 with 0 implying no correlation...

Analyze audio using Fast Fourier Transform

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

The array you are showing is the Fourier Transform coefficients of the audio signal. These coefficients can be used to get.. Fourier Transform coefficients of the audio signal. These coefficients can be used to get the frequency content of the audio. The.. FFT is defined for complex valued input functions so the coefficients you get out will be imaginary numbers even though your input..

How do I calculate r-squared using Python and Numpy?

http://stackoverflow.com/questions/893657/how-do-i-calculate-r-squared-using-python-and-numpy

etc. . This much works but I also want to calculate r coefficient of correlation and r squared coefficient of determination ... to calculate r coefficient of correlation and r squared coefficient of determination . I am comparing my results with Excel's best..