title: Enlarging plot in mplot3D
body: <p>I'm trying to compose an image with both 2D and 3D plot. so far I've done the following:</p>
  
  <pre><code>import idlsave
  import matplotlib
  from matplotlib import *
  import numpy as np
  from mpl_toolkits.mplot3d import Axes3D
  import matplotlib.pyplot as plt
  from matplotlib.patches import Ellipse
  from matplotlib import rc
  rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
  fig = plt.figure(figsize=(18,5))
  ax = fig.add_subplot(1,3,1, projection='3d',azim=-133,elev=14)
  l = ax.plot3D(X3D,Y3D,Z3D,lw=2,color='red')
  ax.set_xlim3d(-10,10)
  ax.set_ylim3d(-10,10)
  ax.set_zlim3d(-10,10)
  ax.text(-2,-7,-11,'b$_r$ [mT]','x')
  ax.text(-5,-1,-11,'b$_p$ [mT]','y')
  ax.set_zlabel(r'b$_t$ [mT]')
  ax.plot([bEq[0],-bEq[0]],[bEq[1],-bEq[1]],[bEq[2],-bEq[2]],'b--',lw=2)
  ax.plot([pLe[0],-pLe[0]],[pLe[1],-pLe[1]],[pLe[2],-pLe[2]],color='black',lw=2)
  ax.text(3,12,9.2,'(a)', fontsize=14)
  ax = fig.add_subplot(1,3,2)
  l = ax.plot(br,bp,'k-',lw=2)
  ax.set_xlabel(r'b$_{\lambda_1}$ [mT]')
  ax.set_ylabel(r'b$_{\lambda_2}$ [mT]')
  ax.set_xlim(-2,6.3)
  ax.set_ylim(-5.5,5.5)
  ax.plot([0,0],[-5.5,5.5],'k-.')
  ax.plot([-2,6.3],[0,0],'k-.')
  e=Ellipse((pf[2],pf[3]),2*pf[0],2*pf[1],-   pf[4]*57.2958,fc='none',lw=2,ls='dashed',ec='red')
  ax.add_artist(e)
  ax.text(-1,4, '(b)', fontsize=14)
  ax = fig.add_subplot(1,3,3)
  ax.plot(-bxDip,-byDip,'b-',lw=2,label='$\mathcal{D}$')
  ax.plot(-bxMon,-byMon,'r-',lw=2,label='$\mathcal{M}$')
  ax.set_xlabel(r'b$_{\lambda_1}$')
  ax.set_ylabel(r'b$_{\lambda_2}$')
  ax.set_xlim(-4,12)
  ax.set_ylim(-6,7)
  ax.plot([-4,12],[0,0],'k-.')
  ax.plot([0,0],[-6,7],'k-.')
  ax.legend(loc='upper right')
  ax.text(-3,5.5, '(c)', fontsize=14)
  plt.savefig("../pdf_box/fig3.pdf",bbox_inches='tight')
  </code></pre>
  
  <p>Wit the present code I was able to produce the figure reported here <a href="http://img219.imageshack.us/i/fig3e.png/" rel="nofollow">http://img219.imageshack.us/i/fig3e.png/</a></p>
  
  <p>There are two question which puzzle me.
  1) As you can see the 3D plot is smaller than the other two and there is enough white spaces between the subplots to increase the size. How can I do this? i.e. How can I enlarge the size of one subplot, eventually decreasing the other two?
  2) I would like to exclude the grey background in the 3D plot.</p>
  
  <p>Any help is very welcomed.</p>