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python Programming Glossary: np.vstackavarage of a number of arrays with numpy without considering zero values http://stackoverflow.com/questions/13281904/avarage-of-a-number-of-arrays-with-numpy-without-considering-zero-values 553.0 507.5 Or maybe a nicer alternative A np.vstack a b c np.average A axis 0 weights A.astype bool array 167.33333333..
Matplotlib: How to colorize a large number of line segments as independent gradients, efficiently http://stackoverflow.com/questions/13622909/matplotlib-how-to-colorize-a-large-number-of-line-segments-as-independent-gradi by x and y into an array of individual segments. points np.vstack x y .T.reshape 1 1 2 points np.concatenate points 1 points 1.. zip interp item num 20 for item in points segments np.vstack segments color_scalar np.hstack color_scalar fig ax plt.subplots.. by x and y into an array of individual segments. points np.vstack x y .T.reshape 1 1 2 points np.concatenate points 1 points 1..
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 1 n # build A combine all blocks coeff_mat np.hstack np.vstack n_to_M n_to_N np.vstack m_to_M m_to_N # const vector right.. all blocks coeff_mat np.hstack np.vstack n_to_M n_to_N np.vstack m_to_M m_to_N # const vector right side of eq. const n np.ones..
more efficient way to calculate distance in numpy? http://stackoverflow.com/questions/17527340/more-efficient-way-to-calculate-distance-in-numpy by arranging data differently in memory precomputed_flat np.vstack svf.flatten shf.flatten measured_flat np.vstack VVmeasured.flatten.. np.vstack svf.flatten shf.flatten measured_flat np.vstack VVmeasured.flatten HHmeasured.flatten deltas precomputed_flat..
indexing spherical subset of 3d grid data in numpy http://stackoverflow.com/questions/17663393/indexing-spherical-subset-of-3d-grid-data-in-numpy #Generate grid of points X Y Z np.meshgrid x y z data np.vstack X.ravel Y.ravel Z.ravel .T distance sp.distance.cdist data center.reshape..
Solving non-linear equations in python http://stackoverflow.com/questions/19542801/solving-non-linear-equations-in-python In python this would translate to def invert f x y z G np.vstack np.ones_like x x y z .T m _ _ _ np.linalg.lstsq G f d e f g.. b c x y z observation_points return func x y z a b c xdata np.vstack x y z model cov opt.curve_fit wrapped_func xdata f return model.. c z a b np.sin c return f def linear_invert f x y z G np.vstack np.ones_like x x y z .T m _ _ _ np.linalg.lstsq G f d e f g..
http://stackoverflow.com/questions/4502656/how-to-sort-my-paws xi yi # Resample the values onto the 20x20 grid coords np.vstack yi.flatten xi.flatten zi map_coordinates paw coords zi zi.reshape..
Efficient Numpy 2D array construction from 1D array http://stackoverflow.com/questions/4923617/efficient-numpy-2d-array-construction-from-1d-array I wish to use B A 0 length 1 for i in range 1 length B np.vstack B A i i width 1 python numpy share improve this question.. For example using a np.arange 100000 and window 3 timeit np.vstack a i i window for i in xrange window .T 1000 loops best of 3..
How to add items into a numpy array http://stackoverflow.com/questions/5064822/how-to-add-items-into-a-numpy-array the functions that do this are for 2 D arrays np.hstack np.vstack np.column_stack np.row_stack for 3 D arrays the above plus np.dstack..
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 zi scipy.ndimage.map_coordinates z np.vstack x y # Plot... fig axes plt.subplots nrows 2 axes 0 .imshow z..
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