function [Vx, Vy, Vz] =racunanjeBrzina(x, y, z)

x1 = x;
x1(1) = [];
x2 = x;
a = length(x);
x2(a) = [];

Vx = x1 - x2;

y1 = y;
y1(1) = [];
y2 = y;
a = length(y);
y2(a) = [];

Vy = y1 - y2;

z1 = z;
z1(1) = [];
z2 = z;
a = length(z);
z2(a) = [];

Vz = z1 - z2;
plot3(x,y,z);

return