# Can we draw digital waveform graph with Pyplot in python or Matlab?

I am trying to draw digital signal waveform graph for bits like 01010101010101 using pyplot in python, like

Is it possible with Pyplot?

As noted by tcaswell, the right function to use is `step`. Here an example that approximates your given plot:

``````import matplotlib.pyplot as plt
import numpy as np

def my_lines(ax, pos, *args, **kwargs):
if ax == 'x':
for p in pos:
plt.axvline(p, *args, **kwargs)
else:
for p in pos:
plt.axhline(p, *args, **kwargs)

bits = [0,1,0,1,0,0,1,1,1,0,0,1,0]
data = np.repeat(bits, 2)
clock = 1 - np.arange(len(data)) % 2
manchester = 1 - np.logical_xor(clock, data)
t = 0.5 * np.arange(len(data))

plt.hold(True)
my_lines('x', range(13), color='.5', linewidth=2)
my_lines('y', [0.5, 2, 4], color='.5', linewidth=2)
plt.step(t, clock + 4, 'r', linewidth = 2, where='post')
plt.step(t, data + 2, 'r', linewidth = 2, where='post')
plt.step(t, manchester, 'r', linewidth = 2, where='post')
plt.ylim([-1,6])

for tbit, bit in enumerate(bits):
plt.text(tbit + 0.5, 1.5, str(bit))

plt.gca().axis('off')
plt.show()
``````