"QR_H.m" function [Q,R] = QR_tao(A) %输入矩阵A %输出正交矩阵Q和上三角矩阵R [n,n]=size(A); E = eye(n); X = zeros(n,); R = zeros(n); P1 = E; :n- s = -sign(A(k,k))*norm(A(k:n,k)); R(k,k) = -s; w = [A(,)+s,A(:n,k)']'; else w = [zeros(,k-),A(k,k)+s,A(k+:n,k)']'; R(:
Divided Land Time Limit: 8000/4000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 56 Accepted Submission(s): 27 Problem Description It’s time to fight the local despots and redistribute the land. There is a r
Count the string Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6062 Accepted Submission(s): 2810 Problem Description It is well known that AekdyCoin is good at string problems as well as nu
Content: 1. Linear Regression 1.1 Linear Regression with one variable 1.1.1 Gradient descent algorithm 1.2 Linear Regression with multiple variable 1.2.1 Feature Scaling 1.2.2 Features and polynomial regression 1.2.3 Normal equation 1.2.4 Probalilist