axis2 : int,optionalAxistobe usedasthe second axisofthe2-Dsub-arraysfromwhich the diagonals should be taken. Defaultstosecond axis (1). Returns --- array_of_diagonals : ndarrayIf`a`is2-D,thena1-D array containing the diagonalandofthe same typeas`a`isreturned unless `a`isa `matrix`,in...
>>>help(A.diagonal)Helpon b来源gaodai#ma#com搞@代~码网uilt-in function diagonal: diagonal(...) method of numpy.matrix instance a.diagonal(offset=0, axis1=0, axis2=1) Return specified diagonals. In NumPy 1.9 the returned array is a read-only view instead of a copy as in previous ...
numpy.ma.diagflat Create a two-dimensional array with the flattened input as a diagonal. numpy.ctypeslib.as_array Create a numpy array from a ctypes array or a ctypes POINTER. numpy.ma.make_mask Create a boolean mask from an array. numpy.ctypeslib.as_ctypes Create and return a ctypes obj...
matrix([[1., 0., 0., 0., 0.],[0., 1., 0., 0., 0.],[0., 0., 1., 0., 0.],[0., 0., 0., 1., 0.],[0., 0., 0., 0., 1.]])矩阵的运算中还经常使⽤对⾓阵，numpy中的对⾓阵⽤eye（）函数来创建。eye（）函数接受五个参数，返回⼀个单位数组。第⼀个...
Learn how to use the NumPy diag function to create a diagonal array from a given array or extract the diagonal elements from a matrix.
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Here, the diagonal elements of matrix a are extracted and then used to create a new diagonal matrix. Visual Presentation: Frequently Asked Questions (FAQ): numpy. diag() Function 1.What does the numpy.diag() function do? The numpy.diag() function creates a diagonal matrix from a 1-D arr...
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Create a file called maclaurin.py: Python from math import e, factorial import numpy as np fac = np.vectorize(factorial) def e_x(x, terms=10): """Approximates e^x using a given number of terms of the Maclaurin series """ n = np.arange(terms) return np.sum((x ** n) / fac...
PyObjectPyArray_SimpleNewFromData(intnd,npy_intpconstdims, inttypenum, voiddata* ) Create an array wrapper arounddatapointed to by the given pointer. The array flags will have a default that the data area is well-behaved and C-style contiguous. The shape of the array is given by thedimsc...