Draw Arrows Instead Of Line With Plotv Command

Hello all

I was hoping someone could help the following problem.

I am trying to plot vectors using the plotv command which draws a vector from the origin - but instaed of a line i wanted an arrow to be drawn is this possbile?

For example i have the matrix f1 = [1 3;5 20]

plotv(f1,'-') gives me the following plot:-

As you can see i just have 2 x lines which represent my vector, howwever i wanted to replace these lines with arrows - can this be done?

Any help or sight will be appericated.

Thank you.