How to evaluate function with two variables

How to evaluate the function when f(x,y)=sin(pi*x)*exp(-(pi)^2*t) when t=0:0.1:0.5,x=0.2:0.2:0.8

Answer 1

[Stephen23]

>> t = 0:0.1:0.5
t =
    0.00000    0.10000    0.20000    0.30000    0.40000    0.50000

>> x = (0.2:0.2:0.8).'
x =
   0.20000
   0.40000
   0.60000
   0.80000

>> M = bsxfun(@times,sin(pi*x),exp(-(pi)^2*t))
M =
   0.5877853   0.2190722   0.0816499   0.0304316   0.0113421   0.0042273
   0.9510565   0.3544662   0.1321123   0.0492393   0.0183519   0.0068399
   0.9510565   0.3544662   0.1321123   0.0492393   0.0183519   0.0068399
   0.5877853   0.2190722   0.0816499   0.0304316   0.0113421   0.0042273

[qudsia Bashir]

Thank you. Can you please also tell me how to plot this i used

plot(x,t,M)

but itsnot working

[Stephen23]

"Can you please also tell me how to plot this..."

Sure, how do you want to plot it:

1. six lines with independent variable x
2. four lines with independent variable t
3. a surface or mesh or similar,
4. something else...

[qudsia Bashir]

a surface or mesh

[Stephen23]

surf(t,x,M)
mesh(t,x,M)