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python Programming Glossary: np.meanavarage 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 0 258 b np.array 156 136 156 0 c np.array 193 150 950 757 np.mean x for x in s if x for s in np.c_ a b c 167.33333333333334 157.33333333333334..
Finding the row with the highest average in a numpy array http://stackoverflow.com/questions/17395516/finding-the-row-with-the-highest-average-in-a-numpy-array ... 0 1 2 4 ... 1 0 3 5 ... 2 3 0 6 ... 4 5 6 0 np.argmax np.mean complete_matrix axis 1 3 Reference numpy.mean numpy.argmax ..
How to Calculate Centroid in python http://stackoverflow.com/questions/18714587/how-to-calculate-centroid-in-python 22.48 4.21 33.97 21.59 8.22 34.04 21.37 8.69 35.16 In np.mean data 3 axis 0 Out array 24.74647059 7.81117647 34.64823529 Some..
Inverse Distance Weighted (IDW) Interpolation with Python http://stackoverflow.com/questions/3104781/inverse-distance-weighted-idw-interpolation-with-python def terrain x ~ rolling hills return np.sin 2 np.pi cycle np.mean x axis 1 known np.random.uniform size N Ndim .5 # 1 p 1 density.. eps eps p p print average distances to nearest points s np.mean invdisttree.distances axis 0 print average weights s invdisttree.wsum.. ask interpol print average terrain interpolated .2g np.mean err # print interpolate a single point .2g # invdisttree known..
How do I plot multiple X or Y axes in matplotlib? http://stackoverflow.com/questions/3918028/how-do-i-plot-multiple-x-or-y-axes-in-matplotlib ymin ax.get_ylim 0 ypad 0.01 np.ptp ax.get_ylim xcenter np.mean xspan left_arrow annotate ax name xspan 0 xcenter ymin ypad..
Efficient Numpy 2D array construction from 1D array http://stackoverflow.com/questions/4923617/efficient-numpy-2d-array-construction-from-1d-array 5 6 7 6 7 8 7 8 9 Calculate rolling mean of last dimension np.mean rolling_window x 3 1 array 1. 2. 3. 6. 7. 8. if window 1 raise..
NumPy: calculate averages with NaNs removed http://stackoverflow.com/questions/5480694/numpy-calculate-averages-with-nans-removed nan nan nan mdat np.ma.masked_array dat np.isnan dat mm np.mean mdat axis 1 print mm.filled np.nan # the desired answer Edit.. np.nan method1 mdat np.ma.masked_array dat np.isnan dat mm np.mean mdat axis 1 mm.filled np.nan N 2 t1 Timer method1 setupstr .timeit.. np.nan N 2 t1 Timer method1 setupstr .timeit N t2 Timer np.mean l for l in d if not np.isnan l for d in dat setupstr .timeit..
How to get the correlation between two timeseries using Pandas http://stackoverflow.com/questions/6467832/how-to-get-the-correlation-between-two-timeseries-using-pandas
Equivalent of Matlab's cluster quality function? http://stackoverflow.com/questions/6644445/equivalent-of-matlabs-cluster-quality-function # instances in same cluster other than instance itself a i np.mean D i ind for ind in kIndices cIDX i if ind i # instances in other.. in other clusters one cluster at a time b i np.min np.mean D i ind for k ind in enumerate kIndices if cIDX i k s b a np.maximum..
Python OpenCV - Find black areas in a binary image http://stackoverflow.com/questions/9056646/python-opencv-find-black-areas-in-a-binary-image np.min img regionMask # Mean Intensity MeanIntensity np.mean img regionMask axis 0 # pixel values PixelValues img regionMask..
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