Not exact coordinates plotting matplotlib

Question

I am plotting coordinates in order to have same result of this pitch (plotting only green X)

But my result is not exact, points are shifted up and right:

This is my code

import matplotlib.pyplot as plt
import matplotlib
import numpy as np

im = plt.imread('statszone_football_pitch.png')
implot = plt.imshow(im, aspect='auto')
xlim, ylim = plt.xlim(), plt.ylim()

dpi=90


fig = plt.figure(figsize=(620/dpi, 579/dpi), dpi=dpi)
ax = fig.add_axes([0, 0, 1, 1], frame_on=False)
#ax.xaxis.set_visible(False)
#ax.yaxis.set_visible(False)
ax.imshow(im, interpolation='none')

y, x = np.genfromtxt('coordinate_tackle_success.csv', delimiter=',', unpack=True)
plt.plot(x,y, "o")
plt.xlim(xlim)
plt.ylim(ylim)

plt.savefig('tackles.png')

Roland Smith · Accepted Answer · 2016-04-30 16:02:21Z

1

In ax.imshow, you could add the extent argument to influence the placement of the image.

answered Apr 30, 2016 at 16:02

Roland Smith

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3 Comments

slash89mf Over a year ago

How do i set extent in this case?

Roland Smith Over a year ago

You add it as a named argument to the imshow call. See the documentation that I linked to.

slash89mf Over a year ago

Well using the size of the pitch as extent ([0,760,0,520]) I have bad positioning as before

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