Create 12 freely placed iaf_psc_alpha neurons

BCCN Tutorial @ CNS*09 Hans Ekkehard Plesser, UMB

import nest
import matplotlib.pyplot as plt

nest.ResetKernel()

pos = nest.spatial.free([nest.random.uniform(-0.75, 0.75), nest.random.uniform(-0.5, 0.5)], extent=[2., 1.5])

l1 = nest.Create('iaf_psc_alpha', 12, positions=pos)

nest.PrintNodes()

nest.PlotLayer(l1, nodesize=50)

# beautify
plt.axis([-1.0, 1.0, -0.75, 0.75])
plt.axes().set_aspect('equal', 'box')
plt.axes().set_xticks((-0.75, -0.25, 0.25, 0.75))
plt.axes().set_yticks((-0.5, 0, 0.5))
plt.grid(True)
plt.xlabel('Extent: 2.0')
plt.ylabel('Extent: 1.5')

plt.show()

# plt.savefig('grid_iaf_irr.png')