I am trying to save a png image using the following commands:
fig = plt.figure(figsize=(14, 8))
ax1 = fig.add_subplot(221)
subplt1=(usub1_sfc-usub2_sfc).plot(vmin=-2.5e-2,vmax=2.5e-2,add_colorbar=False)
cb=plt.colorbar(subplt1,extend='both')
cb.ax.set_title('m/s', size=14)
cb.ax.tick_params(labelsize=12)
ax1.tick_params(labelsize=12)
ax1.set_xticks(np.arange(0,3500,500))
ax1.set_yticks(np.arange(0,2500,500))
#plt.xticks(fontsize=10)
#fig.colorbar(subplt1)
plt.title('USUBM$_{\mathrm{1km}}$ - USUBM$_{\mathrm{5km}}$')
plt.xlabel('nlon',fontsize=16)
plt.ylabel('nlat',fontsize=16)
ax2 = fig.add_subplot(222)
subplt2=(usub3_sfc-usub2_sfc).plot(vmin=-2.5e-2,vmax=2.5e-2,add_colorbar=False)
cb=plt.colorbar(subplt2,extend='both')
cb.ax.set_title(label='m/s', size=14)
cb.ax.tick_params(labelsize=12)
ax2.tick_params(labelsize=12)
ax2.set_xticks(np.arange(0,3500,500))
ax2.set_yticks(np.arange(0,2500,500))
plt.title('USUBM$_{\mathrm{200m}}$ - USUBM$_{\mathrm{5km}}$')
plt.xlabel('nlon',fontsize=16)
plt.ylabel('nlat',fontsize=16)
fig.savefig('./test.png',dpi=130)
My png file ends up having a checkerboard pattern everywhere around the bounding boxes of the plots. Inside the boxes I can see the fields, but everywhere around it the checkerboard pattern covers the axis ticks, axis labels, plot titles, etc.
The file I create looks very much like the third image at this link. The only difference is that there you see the checkerboard everywhere.
Question: How to save the png image without this checkerboard pattern?
Here is the answer to my original question (based on the other thread I linked to):
fig = plt.figure(facecolor="w")
This removed the checkerboard pattern surrounding the plotted area.