matrix=[[0for_inrange(n)]for_inrange(n)] # init matrix num, target=1, n*n while num<=target: foriinrange(left,right+1): #left>right,row-top, top++ matrix[top][i]=num num+=1 top+=1 foriinrange(top, bottom+1): # top>bottom, col-right,right-- matrix[i][right]=num n...
featCount = sortDataMat.shape[-1]foriinrange(featCount): sortColumnMat=sortDataMat[:, i, i]print('sortColumnMat第{0}列,内容为:\n{1}'.format(i, sortColumnMat))---结果: sortColumnMat第0列,内容为: [[1] [4] [6] [7] [12] [21]] sortColumnMat第1列,内容为: [[2] [3] [...
然后如何快速填充到一个 N_1\times N_2 的\zeta 矩阵中? 我们先考虑一个for循环的例子: def select(K,y_f,y_p): """ K: torch.Size([N3,N3]) y_f: torch.Size([N1]) y_p: torch.Size """ zeta = torch.zeros((N1,N2)) # 定义一个N1 by N2的0矩阵 for i in range(N1): for j...
for i in range(n): a = path[i] b = path[(i + 1) % n] total += dist_matrix[a, b] return total def brute_force_tsp(dist_matrix): """暴力搜索全局最优路径""" n = dist_matrix.shape[0] # 生成所有可能的路径排列(固定起点为0,减少计算量) all_paths = permutations(range(1, n...
python 循环:for I in range ( ): range ( start, stop, step) // 包括start,不包括stop 1. del用法 python 中del 的用法 - code力力 - CSDN博客blog.csdn.net del 删除变量,list中保存的是变量 1. containsDuplicate class Solution(object): ...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 import sys def matrixchain_iter(p): n=len(p)-1 #total n matrices 6 #to solve the problem below, so initialize to n+1!!! m=[[0 for i in range(n+1)] for j in range(n+1)] s=[[0 for i in range(n+1)] for j in range...
(21)Λ=(λ0⋯00λ⋯0⋯⋯⋯⋯00⋯λ)=λL 4 The identity matrix is a scalar matrix whose diagonal elements are all 1: (22)1n×n=(10⋯001⋯0⋯⋯⋯⋯00⋯1)1ij=δij.For matrices of the same order: (23)A1=1A=A. 5 Consider now a square matrix A of order...
unique(matches[:, 0], return_index=True)[1]] else: matches = np.zeros((0, 3)) n = matches.shape[0] > 0 m0, m1, _ = matches.transpose().astype(int) for i, gc in enumerate(gt_classes): j = m0 == i if n and sum(j) == 1: self.matrix[detection_classes[...
Diagonal number, specified as an integer.k=0represents the main diagonal,k>0is above the main diagonal, andk<0is below the main diagonal. For anm-by-nmatrix,kis in the range(−m+1)≤k≤(n−1). For example, for matrices withngreater thanm, thek=0main diagonal consists of the ...
1309 for n in range(len(left_keys)) 1310 ) ~/opt/anaconda3/lib/python3.8/site-packages/pandas/core/reshape/merge.py in _factorize_keys(lk, rk, sort) 1922 if sort: 1923 uniques = rizer.uniques.to_array() -> 1924 llab, rlab = _sort_labels(uniques, llab, rlab) ...