Diag:Diagonal matrices and diagonals of a matrix Syntax X = diag(v,k) X = diag(v) v = diag(X,k) v = diag(X) Description X = diag(v,k) when v is a vector of n components, returns a square matrix X of order n+abs(k), with the elements of v on the kth d…
小结: 1.block diagonal matrix 直和 块对角矩阵 A block diagonal matrix is a block matrix that is a square matrix, and having main diagonal blocks square matrices, such that the off-diagonal blocks are zero matrices. A block diagonal matrix A has the form wher…
C. Below the Diagonal You are given a square matrix consisting of n rows and n columns. We assume that the rows are numbered from 1 to n from top to bottom and the columns are numbered from 1 to n from left to right. Some cells (n - 1 cells in total)…
http://scottsievert.github.io/blog/2015/01/31/the-mysterious-eigenvalue/ The Fibonacci problem is a well known mathematical problem that models population growth and was conceived in the 1200s. Leonardo of Pisa aka Fibonacci decided to use a recursiv…
diagonal Return specified diagonals. diagflat Create a 2-D array with the flattened input as a diagonal. trace Sum along diagonals. triu Upper triangle of an array. tril Lower triangle of an array. 先讲一个方阵的对角线下的下三角阵和对角线上的上三角阵提取出来(如果只需要上下三角阵,则去掉tril/tr…
About this Course Machine learning is the science of getting computers to act without being explicitly programmed. In the past decade, machine learning has given us self-driving cars, practical speech recognition, effective web search, and a vastly i…