x=solve('465*sin(x)+200=120*cos(t*1.2+pi/3)+369*sin(x-y)','x');所以软件会提示有关sym的信息。2、如要显示x值，其该语句最后不能有分号（；）。由于你给出的t、y值是以一组向量形式存放的，因此要计算你的x值必须要用循环语句（如for。。。end语句）来求解。需要在t、y值后...
sol = solve([eqn1, eqn2, eqn3], [Vo]); sol % sol.Vx symsx y z c eqn1 = 2*x + y + z == 2; sol = solve([eqn1], [x]); sol I try to obtain transfer function of a circuit but I get empty sym. I have three equations with many more variables, so I expect symbolic...
1 matlab解方程组应该有4组解,但只解出一组。 syms f1 f2 a t;s=solve('f1 =5196.4+9081.3*cos(a)+10919*cos(t)*cos(a)-6062*sin(t)*sin(a)','f2 =9081.3*sin(a)+10919*cos(t)*sin(a)+6062*sin(t)*cos(a)','f1^2/11282881-f2^2/15720000=1','(-10919*sin(t)*sin(a)+6062...
matlab solve函数求出的工作区方程根是sym 那怎么查看他具体值呢？网上查了好多 有说subs的 有说double...
(b)ifRA==RBifRA==nX=A\B%方程组满秩时,求出唯一解elsep=pinv(A)*b%在方程组不满秩时,求出特解Y=null(A,'r')%求出方程组的基础解系n1=length(Y(1,:))k=sym(['kI'])%这里是ki,是为了把数组k说明成字符型变量fori=1:n1%求出方程的全部解k(i)=strcat('k',num2str(i))p=p+k(i)*...
Solve a system of equations. Use one output argument to return the solutions in the form of a structure array. symsuvY = vpasolve([v^3 + 2*u == v, v^2 == u], [u,v]) Y =struct with fields:u: [3x1 sym] v: [3x1 sym] ...
x =[ empty sym ]y =[]>> 答案 最后一句改成[x,y]=solve('y=tan(a+b)*x','x^2+y^2=d','d,b');能求了,不过求出的x,y表达式里仍含有x,y.x =atan(y/x) - ay =x^2 + y^2不知道是不是matlab求不出解析解来!用mathematica或者maple吧!
matlab中怎么求二元二次方程组我在计算的时候出现这个结果{syms x y;>> solve('x^2+y^2+30*y=175','x^2-90*x+y^2=-800')ans = x:[2x1 sym]y:[2x1 sym]}这个X、Y似乎不是我要的数值,更主要的是看不懂,
matlab R2009a>> syms x>> s = solve(x^3+cos(x)) s = -0.86547403310161444662068590118623
matlab怎么连怎么简单的方程都解不出来?很明显x=-8不就是解吗?>> syms x>> solve('x^(1/3)=-2','x')Warning:Explicit solution could not be found.> In solve at 81ans =[ empty sym ]