title: matplotlib custom marker, empty or filled circle with plus sign inside
body: <p>I am trying to make a simple plot in matplotlib with custom marker. I am looking for a marker that looks like an empty or filled circle with plus sign that extends from inside to outside<a href="https://i.stack.imgur.com/QJVqw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QJVqw.png" alt="enter image description here"></a>. Also I want to set a custom (bigger than default) marker size. This marker is necessary to present the data. I am attaching my code here:</p>
  
  <pre><code>import sys
  import os
  import numpy
  import matplotlib.pyplot as plt
  from pylab import *
  
  
  trap_error = 'mag_velocity.txt'
  
  mag, vel = numpy.loadtxt(trap_error, unpack =True)
  
  #plt.plot(vel, mag, '\\bigoplus')
  plt.plot(vel, mag, marker='$\\bigoplus$', markersize=15)     
  plt.ylim(-11, -19)
  plt.xlim(-2, -7)
  
  plt.show()
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/X1wIP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/X1wIP.png" alt="enter image description here"></a></p>
  
  <p>I looked into internet and I thought '\bigoplus' is what I am looking for, but it seems not to work.</p>