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下述代码为初应力法的迭代算法的实现。 functionSolveModelglobalgNodegElementgMaterialgBC1gKgDeltagNodeStressgElementStressgDFgElementStraingFE%% step 1. 定义整体刚度矩阵和节点力向量[node_number,dummy]=size(gNode);gK=sparse(node_number*2,node_number*2);gFE=sparse(node_number*2,1);%整体内力向量f=...
特征值方法,即将多项式转化友矩阵(companion matrix) 然后使用求矩阵特征值的算法求得所有解(那是另外一个问题了) 也就是说,之前写了几篇关于非线性求解的,如二分法、牛顿法(参见二分法、不动点迭代、牛顿法)、二次反插法(参见插值法),只有一个库函数用了类似的方法。 各函数用法详解 1. (符号/数值)解方程(...
Solve Matrix A = B for variables a b and c with... Learn more about matrix, solve, equations, sin, cos
方程的解是一组可以符合方程的未知数，也就是说若用方程的解来取代未知数，会使方程变为恒等式。MATLAB是matrix&laboratory两个词的组合，意为矩阵工厂（矩阵实验室），软件主要面对科学计算、可视化以及交互式程序设计的高科技计算环境。它将数值分析、矩阵计算、科学数据可视化以及非线性动态系统的建模和仿真等诸多强大...
Matrix decomposition for solving linear systems expand all in page Description decomposition creates reusable matrix decompositions (LU, LDL, Cholesky, QR, and more) that enable you to solve linear systems (Ax = b or xA = b) more efficiently. For example, after computing dA = decomposition(A)...
1. (符号/数值)解方程(组)函数 solve 官方参考页:Equations and systems solver - MATLAB solve solve 是基本的用于符号解方程的内置函数,返回类型为符号变量矩阵($m\times n$ sym)。当无法符号求解时,抛出警告并输出一个数值解。基本形式为: solve(eqn, var, Name, Val); % eqn为符号表达式/符号变量/符号...
% % exact solution: u = x*cos(x) % % Generate the information matrices: P, T, E ; % Assemble the matrices and vectors: local assembly based on P, T, E only ; % Deal with the boundary conditions: boundary information matrix and local assembly ; % Solve linear systems: numerical lin...
Matrix A_0, B, A, and C are given. R can be found by using successive substitutions method After i found R, i use this code to find pi^(0) (q is the same as pi^(0)) q=sym('q',[1 mm]) %row vector I=eye(mm);
Solve a simple system of linear equations using sparse matrices. Consider the matrix equation A*x = B. Get A = sparse([0 2 0 1 0; 4 -1 -1 0 0; 0 0 0 3 -6; -2 0 0 0 2; 0 0 4 2 0]); B = sparse([8; -1; -18; 8; 20]); x = A\B x = 5x1 sparse do...