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python Programming Glossary: coeffsfitting a linear surface with numpy least squares http://stackoverflow.com/questions/12617985/fitting-a-linear-surface-with-numpy-least-squares problem. I have tried where x y z are arrays ys zip x y coeffs residuals rank sing_vals np.linalg.lstsq ys z am I right in.. rank sing_vals np.linalg.lstsq ys z am I right in thinking coeffs b c Or am I going completely in the wrong direction. I just..
How does perspective transformation work in PIL? http://stackoverflow.com/questions/14177744/how-does-perspective-transformation-work-in-pil according from the mentioned link import numpy def find_coeffs pa pb matrix for p1 p2 in zip pa pb matrix.append p1 0 p1 1.. perform a perspective transformation to revert the shear coeffs find_coeffs 0 0 256 0 256 256 0 256 0 0 256 0 new_width height.. perspective transformation to revert the shear coeffs find_coeffs 0 0 256 0 256 256 0 256 0 0 256 0 new_width height xshift height..
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 # Polynomial Regression def polyfit x y degree results coeffs numpy.polyfit x y degree # Polynomial Coefficients results 'polynomial'.. x y degree # Polynomial Coefficients results 'polynomial' coeffs.tolist correlation numpy.corrcoef x y 0 1 # r results 'correlation'.. # Polynomial Regression def polyfit x y degree results coeffs numpy.polyfit x y degree # Polynomial Coefficients results 'polynomial'..
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