2010-05-02 20:19, aditya bhargava skrev:

Is there a straightforward way of plotting a vector in matplotlib?

Suppose I want to plot the vector [1 2]'. If I pass this vector in to

plot(), I get the line that passes through (0,1), (1,2). Instead I want

the line that passes through (0,0),(1,2).

I use pyplot.Arrow to visualize displacement fields.

This is a snippet copied from the code I use (it sits in a loop over all vectors I want to plot):

arr = plt.Arrow(x, y, dx, dy)

plt.gca().add_patch(arr)

In your case, you would have (x, y) = (0, 0) and (dx, dy) = (1, 2).

Regards

Johan