matlab 报错 求指导x=0:0.0001:1;y=[1/(i*6.24375)]*[(-2.93*exp(i*1.373*x)-0.05)]*exp(-x/58.213)+[1/(i*5.747)*exp(-x/58.213)]-[1/(i*8.003)*exp(-x/13.222)*exp(i*1.08*x)];z=abs(y);plot(x,z);总是报错啊Error using ==> mtimesInner matrix dimensions

MATLAB中画图函数,plot(x,f)语句为什么一直报错?f是x的函数,求大神指导, matlab解微分方程组,这个程序报错,求指导如何改~function x_dot=cha721lotka_volterra(t,x)x_dot=zeros(2,1);x=zeros(2,1);x_dot=[4*x(1)-2*x(1)*x(2);x(1)*x(2)-3*x(2)];t_final=100;x0=[2,3];[t,x]=ode45('cha721lotka_volterra',[0,t_final],x0);p matlab 报错 求指导x=0:0.0001:1;y=[1/(i*6.24375)]*[(-2.93*exp(i*1.373*x)-0.05)]*exp(-x/58.213)+[1/(i*5.747)*exp(-x/58.213)]-[1/(i*8.003)*exp(-x/13.222)*exp(i*1.08*x)];z=abs(y);plot(x,z);总是报错啊Error using ==> mtimesInner matrix dimensions matlab画图x = 0:0.01:10; y =sin(2*x)*cos(100*x)/(2*x); plot(x, y)这个程序为什么matlab总是报错?哪里错了?求大神赐教 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 在用matlab画图时出不来图,帮忙看看是不是语句错了,求指导,x=0;2.5;要表示现在0~2,.5的区间里r=(10^(-5)*(((1-x)/15).^2-0.696).^0.5)plot(x,r) 关于Matlab中使用fsolve求解方程组x^2*y^2-2*x-1=0,x^2-y^2-1=0的解,求高手指导菜鸟,急,建立文件运行结果出错,不知道错在哪里,求高手指导,由于刚学习这个,所以请尽量说详细点,谢谢 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提示Error:Incomplete or misformed expression or statement.x=0:2*pi:100;s=20*(4*x/pi-(1/(2*pi))*sin(8*pi*x/pi);plot(x,s);求指导. matlab solve 函数 求 （1+0.2x^2）^(-0.5)/x=4.2336我用的是x=solve('(5./6).^3./x.*(1+0.2.*x.^2).^(-0.5)-2.45=0','x')但是报错Undefined function 'solve' for input arguments of type 'char'.Error in hw5 (line 2)x=solve('(5./6).^3./x.*(1+0.2.*x matlab画图报错、、、、clc,clearx=-10:0.1:10;y=x.*(x4);plot(x,y) MATLAB绘制分段函数报错,求大神解答（财富值有限请您见谅）x=0:0.01:3.2; if x>=0&x=0.4&x=0.8&x=2&x=2.8&x plotVectors must be the same lengths. matlab求定积分报错The integrand function must return an output vector of the same length as the i>> df=@(x)exp(x)*(exp(x))'df = @(x)exp(x)*(exp(x))'>> quad(df,0,1)Error using quad (line 75)The integrand function must return an output vector of matlab神经网络中INITP函数一直报错[W,b]=initp(X,T);就这句 一直错 matlab求解方程,显示empty symsyms x a;fun=1+cos(x)*cosh(x)-a*x.*(sin(x)*cosh(x)-sinh(x)*cos(x));Y=solve(fun,'x')想求x的表达式,求高手指导 如何用matlab画出函数y=x*exp（-2X）的图像?用了下面的命令,但报错x=linspace(0,2.5,100); y=x*exp(-2*x）; 跪求matlab大神指导!错在哪里 如何修改啊?>> figure;for s0=[0.9 0.7 0.5 0.3 0.1] x0=[1-s0,s0]; [t,x]=ode45(@sirfun,ts,x0); s=x(:,2);i=x(:,1); plot(s,i);hold on;endxlabel('S');ylabel('R')axis([0 1 0 1])plot([0 1],[1,0],'r')tit matlab中lsqcurvefit函数报错问题函数程序：function f=myfun(a,x)f=a(1)*35*exp(a(2)*x+a(3)*x^2);命令：x=[11.6 12.8 14.1 14.4 13.9 13 12.4];y=[-0.3 -1 -1.48 -1.16 -1.26 -0.67 -0.73];a0=[0,0];[x,Resnorm]=lsqcurvefit(@myfun,a0,x,y)报错：E