Based on my understanding, you wish to scale the ranges of all three axes to be same and set limits of the plots such that the whole figure is visible.
The maximum range of the data can be calculated by using the max function as:
max_range = max([max(abs(X)), max(abs(Y)), max(abs(Z))]);
Then, after plotting the data you can set the limits for the axes by using the axis function as:
axis([-max_range, max_range, -max_range, max_range, -max_range, max_range]);
axis equal;
You may refer to the documentation page of axis for more information : https://www.mathworks.com/help/matlab/ref/axis.html#responsive_offcanvas
