title: How to set some xlim and ylim in Seaborn lmplot facetgrid
body: <p>I'm using <code>sns.lmplot</code> to plot a linear regression, dividing my dataset into two groups with a categorical variable.</p>
  <p>For both x and y, I'd like to manually set the <em>lower bound</em> on both plots, but leave the <em>upper bound</em> at the Seaborn default.
  Here's a simple example:</p>
  <pre><code>import pandas as pd
  import seaborn as sns
  import numpy as np
  
  n = 200
  np.random.seed(2014)
  base_x = np.random.rand(n)
  base_y = base_x * 2
  errors = np.random.uniform(size=n)
  y = base_y + errors
  
  df = pd.DataFrame({'X': base_x, 'Y': y, 'Z': ['A','B']*(100)})
  
  mask_for_b = df.Z == 'B'
  df.loc[mask_for_b,['X','Y']] = df.loc[mask_for_b,] *2
  
  sns.lmplot('X','Y',df,col='Z',sharex=False,sharey=False)
  </code></pre>
  <p>This outputs the following:
  <img src="https://i.stack.imgur.com/Pqw2j.png" alt="enter image description here" /></p>
  <p>But in this example, I'd like the xlim and the ylim to be (0,*) . I tried using sns.plt.ylim and sns.plt.xlim but those only affect the right-hand plot.
  Example:</p>
  <pre><code>sns.plt.ylim(0,)
  sns.plt.xlim(0,)
  </code></pre>
  <p><img src="https://i.stack.imgur.com/s9jpF.png" alt="enter image description here" /></p>
  <p>How can I access the xlim and ylim for each plot in the FacetGrid?</p>