Question

I have little problem with axis change.

import matplotlib.pyplot as plt
import numpy as np
from pylab import *

im = plt.imshow(np.flipud(plt.imread('tas.png')), origin='lower')

plt.show()

I had loaded the image and got axis for my image. For X(0-800)&for Y(0-600).
I don’t need such as scale all what i need it is a image as background for my plotting with coordinates which on another axis X(35 77) Y(0 16)
But when i wrote

import matplotlib.pyplot as plt
import numpy as np
from pylab import *

im = plt.imshow(np.flipud(plt.imread('tas.png')), origin='lower')

plt.axis([35, 75, 0, 16]) 
plt.show()

I got only the small part of image. Could anyone help? I would be so grateful for some help.

Answer 1

You want the extent keyword:

im = plt.imshow(np.flipud(plt.imread('tas.png')), 
                origin='lower', 
                extent=[35, 75, 0, 16])

imshow documentation.