How to plot a line given a point and a direction

If you are given the vector equation of a line with point P0 = [0:0] and direction vector v = [0:1] how do you plot this line in Matlab?

Answer 1

[Walter Roberson]

P1 = P0 + v;

Then if you do not need an arrowhead,

plot([P0(1), P1(1)], [P0(2), P1(2)])

If you do need an arrowhead then see https://www.mathworks.com/matlabcentral/fileexchange/278-arrow. You could also use annotation('arrow') but annotations use figure coordinates rather than being relative to the plot.