function usecky_plosny
subplot(2,2,1)
plot([0,3],[0,4])
xlabel('x')
ylabel('y')

subplot(2,2,2)
plot3([0,4],[0,5],[0,6])
xlabel('x')
ylabel('y')
zlabel('z')

%subplot(2,2,3:4)
subplot(2,1,2)
x=linspace(-pi,pi,30);
y=x;
[X,Y]=meshgrid(x,y);
Z=cos(X.*Y);
%mesh(X,Y,Z)
surf(X,Y,Z)
xlabel('x')
ylabel('y')
zlabel('z')

end

