what is the difference between axis normal, axis square, axis equal, and axis tight?
MATLAB: What is the difference between axis normal, axis square, axis equal, and axis tight
plot axis functions
Related Solutions
axis equal sets the aspect ratio so that the data units are the same in every direction. The aspect ratio of the x-, y-, and z-axis is adjusted automatically according to the range of data units in the x, y, and z directions.
axis square makes the current axes region square (or cubed when three-dimensional). This option adjusts the x-axis, y-axis, and z-axis so that they have equal lengths and adjusts the increments between data units accordingly.
I will assume you have already plotted the curve described by your equation (an helix), by calculating "npo" points on the helix. The plot should be something like this:
Then use the following code:
hold on % tells MATLAB to add quiver3 plot to current figure
for i=1:npo % calculation of the tangent, normal and binormal vectors. Note this is done for the i-th point
% of your helix (that is, for p(i)=[x(i), y(i), z(i)])
v=[-R*sin(alpha(i)), R*cos(alpha(i)), h/(2*pi)]; v=v/norm(v); b=[R*h/(2*pi)*sin(alpha(i)), -R*h/(2*pi)*cos(alpha(i)), R^2]; b=b/norm(b); n=cross(b, v); n=n/norm(n); % add quiver3 plot of the three 3D vectors
quiver3(x(i), y(i), z(i), v(1), v(2), v(3), 'r'); quiver3(x(i), y(i), z(i), b(1), b(2), b(3), 'b'); quiver3(x(i), y(i), z(i), n(1), n(2), n(3), 'g'); % save the current figure as a movie "frame"
movie_frames(i)=getframe(gcf); % find all Quiver objects in current figure and delete them (otherwise, with "hold on", we'd
% keep adding arrows on the plot)
res=findobj(gca, 'Type', 'Quiver'); res(1).delete res(2).delete res(3).deleteendTo view the resulting video, call
movie(gcf, movie_frames)
Best Answer