how to enter function expoential function with two variable

calculate u(x,t)= exp (a*x+b*t)

Answer 1

[Star Strider]

Write it as an anonymous function, using vectorised operations:

u = @(x,t) exp (a.*x+b.*t);

then provide its parameters and variables, and see what it produces:

a =  5.0;
b = -0.2;
u = @(x,t) exp (a.*x+b.*t);

x = linspace(0,4);
t = linspace(0,2);
[X,T] = meshgrid(x,t);

U = u(X,T);

figure(1)
surf(X, T, U)
grid on