quad for multi variable functions

I have a function which has 4 different variables and I want to find the numerical integration of it with quad command in case of just one variable. Is it possible?

for instance,

my functions f(x,y,z,t)

quad(f(x,y,z,t),x,0,inf)---> numerical integration in case of x

Therefore I need symbolic result...

Or do you have any other idea?

Answer 1

[Matt J]

If you know the values of the other variables you could do

 y=y0; %known fixed values.
 z=z0;
 t=t0;

 quad(@(x) f(x,y,z,t), 0,largeNum)