Plotting vector in 3D in Matlab

Question

I'm studying Linear Algebra. I would like to visualize a vector [2, 1, 2] in 3D. I used the following command:

quiver3(0,0,0,2,1,2)

And either my understanding of Linear Algebra is off or I'm doing something wrong with MATLAB. But what the plot looks like to me is that it's plotting vector [1.8, 0.9, 1.8].

Answer 1

By default, quiver3 will use whatever scaling that optimizes the display of the vectors.

quiver3(...,scale) automatically scales the vectors to prevent them from overlapping, and then multiplies them by scale. scale = 2 doubles their relative length, and scale = 0.5 halves them. Use scale = 0 to plot the vectors without the automatic scaling.

You'll want to specify the scale parameter as 0 to prevent this automatic scaling and to accurately represent the data that you provide

quiver3(0, 0, 0, 2, 1, 2, 0);