Matlab can graph a surface and in vector in R3 at the same time?

I have de following code:

clc; clear; close all;
[X,Y]=meshgrid(-2:.2:2, -1:.1:1);
Z=(1-X.^2 + Y.^2)/2;
surf(X,Y,Z);
quiver3(3,-1,0,5,3,6);
xlabel('eje x');
ylabel('eje y');
zlabel('eje z');

But I don't can see the two functions in the same graph.

Answer 1

[John D'Errico]

Time to read about the hold command.

hold on

Use it between the two plotting operations.