来自沈煌焕的问题
用Matlab解一个方程组,结果如下,请问怎么回事?是方程组无解吗?S1=-cos(deg2rad(10.11))*41;S2=31.5*cos(deg2rad(10.11))+85*sin(deg2rad(10.11));S3=sin(deg2rad(10.11));S4=-cos(deg2rad(10.11));B1=-12544;B2=-12544*50;B3=12544*22.5;B4=
用Matlab解一个方程组,结果如下,请问怎么回事?是方程组无解吗?
S1=-cos(deg2rad(10.11))*41;
S2=31.5*cos(deg2rad(10.11))+85*sin(deg2rad(10.11));
S3=sin(deg2rad(10.11));
S4=-cos(deg2rad(10.11));
B1=-12544;
B2=-12544*50;
B3=12544*22.5;
B4=0;
A=[1,S4,-1,0;
0,S1,-72.5,85;
-72.5,S2,0,0;
0,S3,0,-1];
B=[B1;B2;B3;B4];
x=inv(A)*B;
Warning:Matrixisclosetosingularorbadlyscaled.Resultsmaybe
inaccurate.RCOND=1.031673e-19.
1回答
2020-12-08 15:08