变量交换 >>> a, b = b, a 循环遍历区间元素 >>>for i in range(10): ... print (i) 返回的是生成器对象,生成器比列表更加节省内存 带索引位置的循环遍历 >>>colors = ['red', 'green', 'blue', 'yellow'] >>>for i, color in enumerate(colors): ... print (i, 'mapping', color) 字…
Modeling Algorithms Boolean Operations of Opencascade eryar@163.com 布尔操作(Boolean Operations)是通过两个形状(S1,S2)的组合来生成新的形状.布尔操作有如下几种类型: u 并集操作Fusion:Gets all the points in S1 or S2; u 交集操作Common:Gets all the points in S1 and S2; u 差集操作Cut S1 by S2:Gets all…
“矩阵代数初步”(Introduction to MATRIX ALGEBRA)课程由Prof. A.K.Kaw(University of South Florida)设计并讲授. PDF格式学习笔记下载(Academia.edu) 第4章课程讲义下载(PDF) Summary Transpose Let $[A]$ be a $m\times n$ matrix. Then $[B]$ is the transpose of $[A]$ if $b_{ji} = a_{ij}$ for al…
“矩阵代数初步”(Introduction to MATRIX ALGEBRA)课程由Prof. A.K.Kaw(University of South Florida)设计并讲授. PDF格式学习笔记下载(Academia.edu) 第3章课程讲义下载(PDF) Summary Addition of matrices Two matrices $[A]$ and $[B]$ can be added only if they are the same size. The addition i…
