Very similar to this question but with the difference that my figure can be as large as it needs to be.
I need to generate a whole bunch of vertically-stacked plots
I found that subplots_adjust(hspace = 0.001) is what ended up working for me. When I use space = None, there is still white space between each plot. Setting it to something very close to zero however seems to force them to line up. What I've uploaded here isn't the most elegant piece of code, but you can see how the hspace works.
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.ticker as tic
fig = plt.figure()
x = np.arange(100)
y = 3.*np.sin(x*2.*np.pi/100.)
for i in range(5):
temp = 510 + i
ax = plt.subplot(temp)
plt.plot(x,y)
plt.subplots_adjust(hspace = .001)
temp = tic.MaxNLocator(3)
ax.yaxis.set_major_locator(temp)
ax.set_xticklabels(())
ax.title.set_visible(False)
plt.show()