import numpy as np
import matplotlib.pyplot as plt


x = np.random.rand(10)
y = np.random.rand(10)
z = np.sqrt(x**2 + y**2)

plt.subplot(321)
plt.scatter(x,y,s=80, c=z, marker=">")

plt.subplot(322)
plt.scatter(x,y,s=80, c=z, marker=(5,0))

verts = zip([-1.,1.,1.,-1.],[-1.,-1.,1.,-1.])
plt.subplot(323)
plt.scatter(x,y,s=80, c=z, marker=(verts,0))
# equivalent:
#plt.scatter(x,y,s=80, c=z, marker=None, verts=verts)

plt.subplot(324)
plt.scatter(x,y,s=80, c=z, marker=(5,1))

plt.subplot(325)
plt.scatter(x,y,s=80, c=z, marker='+')

plt.subplot(326)
plt.scatter(x,y,s=80, c=z, marker=(5,2))

plt.show()