How to plot a line given a point and a direction

2018 1 25
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更新时间：2018 1 25
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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?

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回答（1 个）

Walter Roberson
Walter Roberson 2018-1-25

1 个投票

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.

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