c=[00 0.0;...
0.1 0.5;...
0.2 1.0;...
0.3 -0.5;...
0.4 0.75;...
0.5 0.0;...
0.6 -0.02;...
0.7 -0.10;...
0.8 0.0;...
0.9 0.0;...
1.0 0.0];
%plot(c(:,1),c(:,2));
c20=10;
c40=10;
t0=0:0.1:10;
f0=zeros(size(t0));
csize=size(c);
f0(1:csize(1))=c(:,2)';
f0(c20+1:c20+csize(1))=f0(c20+1:c20+csize(1))+0.3*c(:,2)';
%f0(c40+1:c40+csize(1))=f0(c40+1:c40+csize(1))+0.09*c(:,2)';
plot(t0,f0)
grid on