How can I label or show the value for each line on the side of the graph?

Hello everyone, how can I label each colour

for example in the following picture, each colour label on the side of the graph.

clc; clear
k=0.5;den=1600;cv=725;aLf=k/(den*cv);
L=0.4;td=12*3600;
Ts=20;Ti=10;
nx=60; nxp=nx+1; dx=L/nx; 
nt=6;ntp=nt+1;dt=td/nt; 
x=linspace(0,L,nxp);T=zeros(1,nxp);
depth(1)=0; 
for i=1:nt
time(i)=(i)*dt;
for j=1:nxp;
  depth(j)= j*dx;
  if j==1;
      Tx=Ts;
  else
  Tx=Ts+((Ti-Ts)*(erf(depth(j)/(2*sqrt(aLf*(time(i)))))));
  end
  T(j)=Tx;
  TM(i,:) = T;
end 
plot(x,TM,'linewidth',2);hold on; 
xlabel('Depth from surface(x)');ylabel('Surface Temperature(Ts)');grid on
end

Thanks in advance for your help

Answer 1

[Image Analyst]

Use the legend() function.

[Khuram]

hey, I try using legend, but I think I am using it wrong way, can you please help little more, thanks. here is what I wrote

legend('2h','4h','6h','8h','10h','12h','Location','EastOutside')

and the output i got is this

[Image Analyst]

That's a common problem. You're plotting a 2D array all at once. Try plotting just one column of TM at a time.