extract diagonal elements (from a matrix) or construct a diagonal matrix (from a vector). np.diag(np.reshape([5,6,7], (3,1))) => [5] np.diag(np.reshape([5,6,7], (1,3))) => [5] np.diag([5,6,7]) => a diagonal matrix# same as np.diag(np.reshape([5,6,7], (3...
def construct_diagonal_matrix(n, value): matrix = [[0] * n for _ in range(n)] # 创建一个 n × n 的零矩阵 for i in range(n): for j in range(n): if i == j: matrix[i][j] = value # 主对角线上的元素设置为所需的值 return matrix 这个函数接受两个参数:n 表示矩阵的维度,...
base 如果内存来自其他对象,则为基本对象。 ctypes 一个对象,用于简化数组与ctypes模块的交互。 data Python缓冲区对象指向数组的数据的开始。 dtype 数组元素的数据类型。 flags 关于数组的内存布局的信息。 flat 在数组上的一维迭代器。 imag 数组的虚部。 itemsize 一个数组元素的长度(以字节为单位)。 nbytes 数...
The numpy.diag() function creates a diagonal matrix or extracts the diagonal elements of a matrix. It can also construct a diagonal array from a one-dimensional array. Syntax: numpy.diag(v, k=0) Parameters: Return value: out : ndarray - The extracted diagonal or constructed diagonal array....
tolist()) # To construct a matrix with an arbitrary one-dimensional array on the diagonal, we # can use the np.diag function (which also takes the optional keyword argument k to # specify an offset from the diagonal) diag_data = np.diag([1, 2, 3]) print('diag_data:', diag_...
diag()Extract a diagonal or construct a diagonal array.numpy.diag(v[, k]) diagflat()Create a two-dimensional array with the flattened input as a diagonal.numpy.diagflat(v[, k]) tri()An array with ones at and below the given diagonal and zeros elsewhere.numpy.tri(N[, M, k, dtype]...
linalg.matrix_rank(M[, tol, hermitian])Use the SVD method to return the matrix rank of the array linalg.slogdet(a)Calculate the sign and (natural) logarithm of the array determinant. trace(a[, offset, axis1, axis2, dtype, out])Returns the sum along the diagonal of the array. ...
find() on a matrix returns them, whereas Numpy's find behaves differently. When converting Matlab code it might be necessary to first reshape a matrix to a linear sequence, perform some indexing operations and then reshape back. As reshape (usually) produces views onto the same storage, it ...
If not None, only the words in `vocab` will be used to construct the language model; all out-of-vocabulary words will either be mappend to ``<unk>`` (if ``self.unk = True``) or removed (if ``self.unk = False``). Default is None. ...
vocab : :class:`~numpy_ml.preprocessing.nlp.Vocabulary` instance or None If not None, only the words in `vocab` will be used to construct the language model; all out-of-vocabulary words will either be mappend to ``<unk>`` (if ``self.unk = True``) or removed (if ``self.unk =...