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When I export the numerical solutions from Freefem++ (heat equation with periodic boundary condition). I would like to make one movie to represent the profile of temperature and save in Avi format. The code as below, the movie is not includ "x axis", "title", the "colorbar", I think maybe the reason is the function "ffpdeplot". could you help to improve it? Thanks a lot.

// heats.edp
real t=0;
real dt = 0.001,T=1;
real D=0.1;
mesh Th=square(30,30,[2xpi,2ypi]);
fespace Vh(Th,P1,periodic=[[2,y],[4,y],[1,x],[3,x]]);
Vh uh,uold,vh;
func f=sin(x+pi/4.)cos(y+pi/2.);
problem Heat(uh,vh) = int2d(Th)(uhvh/dt+ Ddx(uh) * dx(vh) + Ddy(uh) * dy(vh) )
-int2d(Th)(uold*vh/dt);

savemesh(Th,"periodic.msh");
Vh u0=0.1exp(-10(x-pi)^2-10*(y-pi)^2);
uold=u0;
int round = 0;
while (t + dt/2. < T)
{
t = t+ dt;
round++;
Heat;
uold=uh;

if(round % 200 == 0)
{
plot(uh,fill=true,value=true);
{
ofstream file("periodic"+round+".txt");
int nbvertices = Th.nv;
for (int i=0; i<nbvertices; i++){
file << uh(Th(i).x, Th(i).y) << "\n";
}
}
}
}
%%%%%%%%%%%%%%%%%%%%

clear all;
addpath('ffmatlib');
%Reads a FreeFem++ mesh created with the savemesh(Th,"mesh.msh"); command
[p,b,t,nv,nbe,nt,labels]=ffreadmesh('periodic.msh');
%Reads the PDE data
[u2]=ffreaddata('periodic200.txt');
[u4]=ffreaddata('periodic400.txt');
[u6]=ffreaddata('periodic600.txt');
[u8]=ffreaddata('periodic800.txt');
[u10]=ffreaddata('periodic1000.txt');

%%%%% 2D Patch (density map) Plot + Contour

theAxes=axis;
fmat=moviein(5);
ffpdeplot(p,b,t, ...
'XYData',u2, ...
'Mesh','off', ...
'Boundary','on', ...
'Contour','on', ...
'Title','Patch Plot + Contour');
fmat(:,1)=getframe;
ffpdeplot(p,b,t, ...
'XYData',u4, ...
'Mesh','off', ...
'Boundary','on', ...
'Contour','on', ...
'Title','Patch Plot + Contour');
fmat(:,2)=getframe;
ffpdeplot(p,b,t, ...
'XYData',u6, ...
'Mesh','off', ...
'Boundary','on', ...
'Contour','on', ...
'Title','Patch Plot + Contour');
fmat(:,3)=getframe;
ffpdeplot(p,b,t, ...
'XYData',u8, ...
'Mesh','off', ...
'Boundary','on', ...
'Contour','on', ...
'Title','Patch Plot + Contour');
fmat(:,4)=getframe;
ffpdeplot(p,b,t, ...
'XYData',u10, ...
'Mesh','off', ...
'Boundary','on', ...
'Contour','on', ...
'Title','Patch Plot + Contour');
fmat(:,5)=getframe;
figure()
movie(fmat,5)

%%make movie
%%%%%%%%%%%%%%%%%%%%%%%%
aviobj=VideoWriter('heats.avi');
open(aviobj)
for ii=1:5
currFrame(ii)=fmat(:,ii);
writeVideo(aviobj,currFrame(ii));
end
close(aviobj)

Potentially affected: fftet2grid
Line:
if ((Va>=-1e-12) && (Vb>=-1e-12) && (Vc>=-1e-12) && (Vd>=-1e-12)){

I would like to sove one Heat equation with Periodic Boundary Conditions. When I got the numerical solution, how to output the data to plot the figure in Matlab?
Because the degrees of numerical solution is less the number of nodes in the mesh. In this case the code can not run. Thanks!