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a=b=np.arange(9).reshape(3,3) i=np.arange(3) mask=a >>array([0, 1, 2]) b[np.where(mask[1])] … Read more Vectorization : Too Many Indices For Array

I am trying to vectorize my code and have reached a roadblock. I have : nxd array of x values [[x1… Read more Interpolate Rows Simultaneously In Python

Does anyone know where this ImportError is originating from and how to fix it? I'm working from… Read more Scikit Learn And Count Vectorizer Error

I have two numpy arrays image and warped_image and indices arrays ix,iy. I need to add image to war… Read more Add A Index Selected Numpy Array To Another Numpy Array With Overlapping Indices

In Python I need to find the pairwise correlation between all features in a matrix A and all featur… Read more Efficient Pairwise Correlation For Two Matrices Of Features

I need to do logical iteration over numpy array, which's values depend on elements of other arr… Read more Iterating Without For Loop In Numpy Array

I want to apply arbitrary function to 3d-ndarray as element, which use (3rd-dimensional) array for … Read more How Do I Apply Function To Third-dimension Array Effectively With Numpy?

I'm coming to python from Matlab. In Matlab, given two vectors that are not necessarily the sam… Read more Numpy: Summing Every Element Of Numpy Array With Every Element Of Another

I have a matrix Y of shape (n, d). I already calculated the pairwise row-differences in the followi… Read more Put Pairwise Differences Of Matrix Rows In 3-d Array

I wanted to test the performance of vectorizing code in python: import timeit import numpy as np d… Read more Performance In Different Vectorization Method In Numpy

I want to compute eigenvectors for an array of data (in my actual case, i cloud of polygons) To do … Read more Quickly Compute Eigenvectors For Each Element Of An Array In Python

I'm doing some matrix calculations (2d) that only involve values in the upper triangle of the m… Read more Is There A Way To Speed Up Numpy Array Calculations When They Only Contain Values In Upper/lower Triangle?

I have a numpy arrary: import numpy as np pval=np.array([[0., 0.,0., 0., 0.,0., 0., 0.], … Read more Numpy Vertical Function :'float' Object Is Not Subscriptable

In TensorFlow, I can get the count of each element in an array with tf.bincount: x = tf.placeholder… Read more Tensorflow: Bincount With Axis Option

Given an array 'array' and a set of indices 'indices', how do I find the cumulative… Read more Find Cumsum Of Subarrays Split By Indices For Numpy Array Efficiently

I'm looking for the most efficient way of finding the intersection of two different-sized matri… Read more Finding Intersection Of Two Matrices In Python Within A Tolerance?

I have a python function given below: def myfun(x): if x > 0: return 0 else: … Read more Efficiency Problem Of Customizing Numpy's Vectorized Operation

My dataframe is as follows: df = pd.DataFrame({'a': {'d': 1, 'e': 0, 'f… Read more Vectorised Method To Append Dataframe Rows To Columns And Vice-versa

Is there a way to vectorize a function so that the output would be an array of means where each mea… Read more Vectorize Numpy Mean Across The Slices Of An Array

I have two 2D numpy arrays, for example: A = numpy.array([[1, 2, 4, 8], [16, 32, 32, 8], [64, 32, 1… Read more How To Check If All Elements Of A Numpy Array Are In Another Numpy Array