(4)编写主调函数clc x=0:0.05:1; t=0:0.05:2; m=0; sol=pdepe(m,@pdefun,@pdeic,@pdebc,x,t); subplot(2,1,1) surf(x,t,sol(:,:,1)) subplot(2,1,2) surf(x,t,sol(:,:,2))练习与思考： This example illustrates the straightforward formulation, computation, and plotting of the solution of a single PDE. 2 ( ) u u t x x         This equation holds on an interval 0 1x  for times 0t  . The PDE satisfies the initial condition ( ,0) sinu x x and boundary conditions (0, ) 0; (1, ) 0 t u u t e t x        2.PDEtool求解偏微分方程