如何在matlab中求解线性符号方程答案

【问题标题】：How to solve linear symbolic equations in matlab如何在matlab中求解线性符号方程
【发布时间】：2020-06-01 00:43:48
【问题描述】：

我正在尝试在 Matlab 中求解以下线性符号系统（20 个方程），我将解中的所有值都设为零，我的实现是否有任何错误？代码中使用的数据在这里 data

%---------------------
% clear and close all
%---------------------
clearvars
close all
clc
%---------------------
% Data type long
%---------------------
format long g
%---------------------
% Read data
%---------------------
load('data.mat')
%---------------------------
% Symbolic variables
syms X11 X12 X13 X14 X21 X22 X23 X24 X31 X32 X33 X34 X41 X42 X43 X44;
%========================
% Quadric 4 x 4 matrix
Q = [X11, X12, X13, X14;
    X21, X22, X23, X24;
    X31, X32, X33, X34;
    X41, X42, X43, X44];

% loop all projections
for i=1:10
    % for wach projection matrix
    P = PPM(:, :, i);

    % Autocalibration equation
    DIAC(3*(i-1)+1:3*i,:) = P * Q * P';

    L(2*(i-1)+1:2*i,1) = DIAC(3*(i-1)+1:3*i-1,3)==0 ;
end

[A,B] = equationsToMatrix(L,[X11, X12, X13, X14,...
     X21, X22, X23, X24, X31, X32, X33, X34,X41, X42, X43, X44]);

Sol = linsolve(A,B)

【问题讨论】：

标签： matlab symbolic-math linear-equation

【解决方案1】：

这个site解释了解决方案，按照我得到的解释：

[Mat,B] = equationsToMatrix(L,[X11, X12, X13, X14,...
     X21, X22, X23, X24, X31, X32, X33, X34,X41, X42, X43, X44]);
% Solution is here
Sol = linsolve(Mat,B);

【讨论】：