imshow() subplots generate unwanted white spaces
<p>When plotting two (or more) subplots, there is a large areas of white spaces within the plots (on all four sides) as seen here:
<a href="https://i.stack.imgur.com/2VPqz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2VPqz.png" alt="enter image description here"></a></p>

<p>Following is the code which I used to plot it.</p>

<pre><code>from pylab import *
from matplotlib import rc, rcParams
import matplotlib.pyplot as plt

for kk in range(57,58):
    fn_i=str(kk)
    image_file_1='RedshiftOutput00'+fn_i+'_Slice_z_RadioPowerDSA.png'
    image_file_2='RedshiftOutput00'+fn_i+'_Slice_z_RadioPowerTRA.png'
    image_file_3='RedshiftOutput00'+fn_i+'_Slice_z_RadioPowerDSA+TRA.png'

    image_1 = plt.imread(image_file_1)
    image_2 = plt.imread(image_file_2)
    image_3 = plt.imread(image_file_3)      

    ax1 = subplot(131)
    plt.imshow(image_1)
    plt.axis('off')  # clear x- and y-axes

    ax2 = subplot(132)
    plt.imshow(image_2)
    plt.axis('off')  # clear x- and y-axes

    ax3 = subplot(133)
    plt.imshow(image_3)
    plt.axis('off')  # clear x- and y-axes

    plt.savefig('RedshiftOutput00'+fn_i+'_all.png')
</code></pre>

<p>I am also uploading the 3 images used in this code to making the code a Minimal Working Example</p>

<p>1) <a href="https://drive.google.com/file/d/0B6l5iRWTUbHWSTF2R3E1THBGeVk/view?usp=sharing" rel="nofollow noreferrer">https://drive.google.com/file/d/0B6l5iRWTUbHWSTF2R3E1THBGeVk/view?usp=sharing</a></p>

<p>2) <a href="https://drive.google.com/file/d/0B6l5iRWTUbHWaFI4dHAzcWpiOEU/view?usp=sharing" rel="nofollow noreferrer">https://drive.google.com/file/d/0B6l5iRWTUbHWaFI4dHAzcWpiOEU/view?usp=sharing</a></p>

<p>3) <a href="https://drive.google.com/file/d/0B6l5iRWTUbHWaG8xclFlcGJNaUk/view?usp=sharing" rel="nofollow noreferrer">https://drive.google.com/file/d/0B6l5iRWTUbHWaG8xclFlcGJNaUk/view?usp=sharing</a></p>

<p>How we can remove this white space ? I tried by fixing the whole plot size, still white space is comming.  </p>