How to rotate axis by 180 degree?

By default, Matlab plots the my three unit vectors (x,y,z) in a way that the z-axis points up. How can I "roll" the orientation around the x-axis by 180 degrees so I can have the z-axis unit vector points down positively?

The right-hand rule has to be preserved - I'm not flipping any of the axis.

x=[1;0;0];
y=[0;1;0];
z=[0;0;1];
quiver3(0,0,0,x(1),x(2),x(3),'Color','green','LineWidth',2,'MaxHeadSize',0.5);
hold on;
quiver3(0,0,0,y(1),y(2),y(3),'Color','blue','LineWidth',2,'MaxHeadSize',0.5);
hold on;
quiver3(0,0,0,z(1),z(2),z(3),'Color','red','LineWidth',2,'MaxHeadSize',0.5);
axlims = norm(x)*1.2;
set(gca,'xlim',[-1,1]*axlims,'ylim',[-1,1]*axlims,'zlim',[-1,1]*axlims);
grid on;
axis square;

Answer 1

[Chunru]

x=[1;0;0];
y=[0;1;0];
z=[0;0;1];
quiver3(0,0,0,x(1),x(2),x(3),'Color','green','LineWidth',2,'MaxHeadSize',0.5);
hold on;
quiver3(0,0,0,y(1),y(2),y(3),'Color','blue','LineWidth',2,'MaxHeadSize',0.5);
hold on;
quiver3(0,0,0,z(1),z(2),z(3),'Color','red','LineWidth',2,'MaxHeadSize',0.5);
axlims = norm(x)*1.2;
set(gca,'xlim',[-1,1]*axlims,'ylim',[-1,1]*axlims,'zlim',[-1,1]*axlims);
grid on;
axis square;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
set(gca, 'ZDir', 'reverse')

[CL]

Ah no - as shown in both images in the question, both orientations has to obey the right-hand-rule. Reversing the orientation would break the the right-hand orientation and direction of rotation. I should have specified it better.

[CL]

ok ... I guess I'll just reverse the Y axis as well then to return to the right-hand orientation. thanks