All Questions

How does np.einsum work? Given arrays A and B, their matrix multiplication followed by transpose is computed using (A @ B).T, or equivalently, using: np.einsum("ij, jk -> ki", A, B)

My result I need to make the number of stars decrease with each line, but I have no idea how. import random import numpy as np import sys size = int(sys.argv[1]) mat = np.full((size, size), '\x1b[35m....

I need to make a multidimensional array of zeros. For two (D=2) or three (D=3) dimensions, this is easy and I'd use: a = numpy.zeros(shape=(n,n)) or a = numpy.zeros(shape=(n,n,n)) How for I for ...

I'm trying to input values into a CSV using a 2d array. I have a string which is separated by ',' to separate the values and ';' to separate each row. string below; text = 536924636,www.microsoft.com,...

I have a multidimensional List like this (the second element already sorted) [[92, 25], [93, 25], [95, 27], [94, 27], [94, 27], [92, 27], [89, 27], [89, 27], [92, 27], [91, 30], [90, 30], [90, 30], [...

I have an array like this: [['G', 10], ['A', 22], ['S', 1], ['P', 14], ['V', 13], ['T', 7], ['C', 0], ['I', 219]] I'd like to sort it based on the 2nd element in descending order. An ideal output ...

I'm working with 3D numpy arrays and having trouble stacking two of them. Here’s what I’m trying to do: import numpy as np grid = np.arange(16).reshape((1, 4, 4)) grid2 = grid[:, :-1, ::-1].copy() I ...

I have looked into documentations and also other questions here, but it seems I have not got the hang of subsetting in numpy arrays yet. I have a numpy array, and for the sake of argument, let it ...

What is the difference between ndarray and array in NumPy? Where is their implementation in the NumPy source code?

I have a 3d matrix like this np.arange(16).reshape((4,2,2)) array([[[ 0, 1], [ 2, 3]], [[ 4, 5], [ 6, 7]], [[ 8, 9], [10, 11]], [[12, 13], ...

I'm trying to use the xr.where() function to create a binary based on multiple arrays. The code I am using is the following: binary = xr.where((snd_nc.SNOWDP >= 0.2) & (tas_nc.tas <= 0) &...

I want to compute pairwise quantities, e.g. distances between two points. A simple example would be import numpy as np N = 9 x = np.linspace(0,1,N) y = np.abs(x - x[:,None]) # pairwise 1d eucdlidian ...

I'm writing an algorithm that detects regions of contiguous empty cells that are completely surrounded (orthogonally) by filled cells and do not extend to the edge of the grid. Let's call such regions ...

Dipping my toes into multi dimensional array slicing in Python and am hitting a wall of confusion with the following code # Example 2D array matrix = [ [1, 2, 3], [4, 5, 6], [7, 8, 9] ] # ...

I used Python with Numpy to create an array filled with numbers from a tuple, and set it up to be a 4x4 matrix. numbers = (-8, -3, -5, 0, 4, 5, 6, 10, 7,8, 9, 100, 10, 11, 12, 1000) numbers_array = ...