matlab pdepe求解偏微分方程答:function pdex1 m=0;x=linspace(0,1,20);t=linspace(0,2,5);sol=pdepe(m,@pdex1pde,@pdex1ic,@pdex1bc,x,t);u=sol(:,:,1);surf(x,t,u)figure plot(x,u(end,:))function[c,f,s]=pdex1pde(x,t,u,DuDx)c=pi^2;f=DuDx;s=u^2;function u0=pdex1ic(x)u0=sin(pi*...