matlab中出现?Conversion to double from sym is not possible.

matlab中出现?Conversion to double from sym is not possible. matlab问题请教,运行时出现错误信息：Conversion to logical from sym is not possible-double matlab中想求出y=dsolve('D2y+y=sin(t) * cos(30)','t'),再画图,该怎么办?会出现Conversion to double from sym is not possible. matlab中出现了这个问题, 在matlab中 出现1.0e+003 syms a x y x=sin(a) y=cosh(x) a=linspace(0,2*pi) plot(a,y) 错误在哪里?matlab中，错误提示：Conversion to double from sym is not possible 我用matlab写了个矩阵,里面还有变量,在我给变量赋完值后,其中一项变为653221/234551,在绘图中说conversion from sym to double is not possible这是怎么回事呢? matlab 中hold on与hold off是不是成对出现 安装matlab的过程中出现这种情况怎么处理? matlab 省略号 出现错误 matlab问题：plot Conversion to double from sym is not possible,这是我的代码,x=0:1:11;y=dsolve('Dy-0.08*y=0','y(0)=80423','x');subplot(2,2,1);ezplot(y,[0,30]);subplot(2,2,2);z=double(x)plot(z,y)为什么用plot就出现上述问题啊,是不 matlab用plot画图出现错误 Error using ==> plot Conversion to double from sym is not possible.程序如下：[ph2,po2]=dsolve('0.005/8.314/T*Dph2=nh2*uf-6.435*10^(-7)*(ph2-3.03*10^5)-0.5*40*i/96485','0.01/8.314/T*Dpo2=nh2*uf/rho-6.435*10^(-7)*(p Matlab Error using ==> plot Conversion to double from sym is not possible.clearx=0:0.1:1;syms a;B=2*int((-x*sin(a)+1)./(1+(x.^2)-2*x*cos(a)).^1.5,a,0,pi);plot(x,B)运行后就出现?Error using ==> plotConversion to double from sym is not possible. matlab中(:,:, matlab中, matlab 中 matlab中( :, MATLAB 出现了这个问题 ATLAB