NumPy (pronounced /ˈnʌmpaɪ/ (NUM-py) or sometimes /ˈnʌmpi/ (NUM-pee)) is a library for the Python programming language, adding support for large, multi-dimensional arrays and matrices, along with a large collection of high-level mathematical functions to operate on these arrays. The ancestor of NumPy, Numeric, was originally created by Jim Hugunin with contributions from several other developers. In 2005, Travis Oliphant created NumPy by incorporating features of the competing Numarray into Numeric, with extensive modifications. NumPy is open-source software and has many contributors. NumPy is a NumFOCUS fiscally sponsored project.
Reference: WIKIPEDIA
137 questions
(Two answers) Last yearI have a matrix list of 100x3 as shown below.There are two things you would like to do with this matrix:·I would like to randomly extract two lines at any number of times (e...
I would like to create the following functions, but I would like to know how to loop any number of times.1. As an argument, take two functions: (1) an arbitrary number of dimensions of numpy array, an...
We are currently calculating the inverse matrix required for simulation in python.The data is stored in variable A of type ndarray,dtype=np.float64, where A is approximately 400x400 matrix.We found th...
Hello, I have a question about python's numpy.When calculating the correlation coefficient, you can calculate it using numpy.corrcoef, but to verify the formula, cov/(numpy.std(X)*numpy.cov(X)*numpy.n...
Please tell me how to do the following calculations at high speed.import numpy as np# It's actually about 100,000 long.a = np.array([1, 2, 3], [4, 5, 6]])# It's about 100,000 feet long.b=np.array([[1,...
I would like to remove the line containing Yokohama from the 2D array below.arr=[ ['AA', 'BB', 'CC',] ['Lemon', '30', 'Tokyo',] ['Lemon', '20', 'Osaka'], ['Lemon', '10', 'Yokohama',] [Peach, 15, Tokyo...
environmentmacos 10.9.5python 2.7.5Numpy 1.11.0gunicorn 19.3.0 What's troubling youI use virtualenv to run python code, but every time I update python code, it becomes importer error numpy.core.multia...
I would like to achieve matrix product operations for each of the following elements in MATLAB that Python numpy.einsum can achieve.import numpy as npa=np.array([[1,2],[3,4]],[[1,3],[-3,1]]]])b=np.arr...
I am having trouble knowing the behavior of the unique() method of numpy at all.import numpy as nplist_with_dupes=[1, 5, 6, 2, 5, 6, 8, 3, 3, 3, 7, 9]# (array([1, 2, 3, 5, 6, 7, 8, 9]) Returns an inde...
While generating random numbers on the stage below (3D), when random walking, I wrote the following code using stage as a conditional statement, but sometimes it works well and sometimes it doesn't.I ...
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