Matlab积分报错 syms x y dx dy z t;global e a c;x=a*cos(t);y=a*e*(1-cos(t))*sin(t);dx=diff(x);dy=diff(y);z=sqrt(dx^2+dy^2);int(((a*cos(t)+c)^2+(a*e*(1-cos(t))*sin(t))^2)*z,t,0,pi-acos(c/a));报错为：Error using mupadmexError in MuPAD command:Ei

matlab 符号运算的问题syms x(t) ;y=x*x;请问怎么求 y对x的导数 diff(y,x) 报错了 Matlab中公式的问题syms x;syms z;syms y;x=1:1000;z=1:1000;y=(x.^(1/3).*1.414^(z-1).*0.4)+1;plot3(x,z,y)Error using ==> mpowerMatrix must be square.为什么总是报错,是不是点没有用好?求教这个公式中的点怎么用. Matlab积分报错 syms x y dx dy z t;global e a c;x=a*cos(t);y=a*e*(1-cos(t))*sin(t);dx=diff(x);dy=diff(y);z=sqrt(dx^2+dy^2);int(((a*cos(t)+c)^2+(a*e*(1-cos(t))*sin(t))^2)*z,t,0,pi-acos(c/a));报错为：Error using mupadmexError in MuPAD command:Ei 为什么在matlab中输入syms x f=sym('x/(cos(x))^2') y(1)=diff(f)报错：Error using ==> diffNot enough input arguments. matlab 想求出p(x,y)=0和q(x,y)=0的解[x0,y0] 为什么报错,说有三个变量?syms x y;p=-y+y^3;q=x;[x0,y0]=solve(p,q,'x','y')报错Warning:1 equations in 3 variables.New variables might be introduced.Warning:Explicit solution could not be foun matlab 符号变量编程求帮助,想求出p(x,y)=0和q(x,y)=0的解[x0,y0] 为什么报错,说有三个变量?syms x y;p=-y+y^3;q=x;[x0,y0]=solve(p,q,'x','y')报错Warning:1 equations in 3 variables.New variables might be introduced.Warning:Explici Matlab中syms构建函数后用fsolve求解例如：syms xy=x^2-1;fsolve(y,-2)结果报错：Error using ==> lsqfcnchk at 111If FUN is a MATLAB object,it must have an feval method.Error in ==> fsolve at 184funfcn = lsqfcnchk(FUN,'fsolve',length(varar matlab求积分：y=sin(x),t=y^2/(a+b*y),积分范围（0,pi）,我是这样编写的： syms x a by=sin(x);int(y^2/(b*y+a),0,pi)结果显示：Warning: Explicit integral could not be found. 求高手指点下,错在哪里,我该怎么求这个积分 matlab求变上限积分对变量x的导数求下列变上限积分对变量x的导数 syms x a tf=sym('sqrt(a+t) '),int(f,x,x^2)错在哪里了? Warning:Explicit integral could not be found.ans =piecewise([a in Dom::ImageSet(y*i,y,R_),(2*(x^ matlab subs错误求解先上一个例子：>>syms x Vx y Vy z Vz;>>syms b d;>>Xstate = [x Vx y Vy z Vz b d].';>>f = [x+T*Vx;Vx;y+T*Vy;Vy;z+T*Vz;Vz;b+T*dd];>>X=zeros(8,1);>> Xp=subs(f,Xstate,X)然后报错了：Error using ==> sym.subs>celleqnThe inp MATLAB 程序老是报错,function CGG(x0,y0,eps)syms x ;syms y;k=0;X=[x,y];X0=[x0,y0];Q=[1 1;1 2];f=inline('x^2+2*y^2+2*x*y','x','y');%f=1/2*X*Q*X';fx=diff(f,x);fy=diff(f,y);G0=[subs(fx,{x,y},X0),subs(fx,{x,y},X0)];% j=jacobian(f,X);% G0=subs(j,X,X0 x*exp^(-x*y) matlab双重积分 matlab求积分syms x; a=int(1/(1-x^2)*(log(1+x)-log(1-x)); a matlab程序：syms x y z; x=-50:0.1:50; y=-50:0.1:50; z=(4-2.1*x.^2+1/3*x.^4)*x.^2+(-4+4*y.^2)*y.^2报错：z=(4-2.1*x.^2+1/3*x.^4)*x.^2+(-4+4*y.^2)*y.^2+x.*y.;|Error:Incomplete or misformed expression or statement.不是分号用错成中文了, matlab 关于inline的问题我不懂matlab,想用它求个积分,但遇到个很久结的问题,我想用matlab求函数y=x2（x的平方）的定积分,积分区间从1到2,下面是我的程序：format long syms x;w=x.^2;f=inline('w');a=quad(f,1, 谁帮我看看这一段matlab的积分程序,错在哪里?syms x yfor i=0.01:0.01:1for j= 0.01:0.01:1y(round(i*100),round(j*100))=int(int(200*exp(x*y),x,i-0.01,i),y,j-0.01,j); endendy matlab运行老是报错.syms L I Rs Rr a Rg Z x yZ=(Rg*(Rs+Rr))^(0.5)a=((Rs+Rr)/Rg)^(0.5)I=1000L=2Rg=15Rs=0.026Rr=0.0001x=0:0.1:2y=-I*Z*Rs*tanh(a*L/2)*cosh(a*x)/(Rs+Rr)+I*Z*Rs*sinh(a*x)/(Rs+Rr)plot(x,y)grid on报错为：Error using ==> plotConversi matlab中函数有多个变量如何只对其中一个积分,并得到函数.function f=cd(y,z)syms x;syms y;syms z;m=((x-1531.2)/0.2)^-8/16+0.5*((x-1531.5)/0.2)^-8/16;n=((x-y)/0.2)^-8/16+0.5*((x-z)/0.2)^-8/16;l=(n-m)^2;f=int(sym(l),x,0,inf);这段