Plotting complementary error function with 2 variables

I am tryimg to plot complementary error function for two variables but it keeps giving me empty figure. Here is my code:

T0 = 100;

T1 = 70;

c = 1;

u = @(x,t) (T0-T1)*erf(x./(2*c*sqrt(t)))+T0;

fsurf(u)

Answer 1

[KSSV]

T0 = 100;
T1 = 70;
c = 1;

x = linspace(-1,1) ;  % define your range 
t = linspace(0,10) ;  % define your range 
[x,t] = meshgrid(x,t) ; 

u = (T0-T1)*erf(x./(2*c*sqrt(t)))+T0;
surf(x,t,u)

[Zaineb Mohamed]

but my x is and t are defined as x > 0 and t > 0 when I put linspace(0,inf) it also give empty graph

[KSSV]

You need to provide some upper limit.....with this you cannot plot.

Answer 2

[VBBV]

T0 = 100;
T1 = 70;
c = 1;
t = linspace(1,10,20);
syms  x
u =  (T0-T1)*erf(x./(2*c*sqrt(t)))+T0;
fplot(u,[1 10])

you can try using fplot function