[FIXED] Multiple lines on a plot using Matplotlib

Issue

I am generating 4 rectangles using ax.add_patch. I want to connect these rectangles using single lines as shown in the expected output.

import matplotlib as mpl
import matplotlib.pyplot as plt
from matplotlib.patches import Rectangle

fig,ax = plt.subplots(1)
n=2
for i in range(0,n):
    for j in range(0,n):
        rect = mpl.patches.Rectangle((200+200*i,200+200*j),10*n, 10*n, linewidth=1, edgecolor='black', facecolor='black')
        ax.add_patch(rect)

ax.set_xlim(left = 0, right = 220*n)
ax.set_ylim(bottom = 0, top = 220*n)
plt.show()

The current output is

The expected output is

Solution

Try placing vertical and horizontal lines at those positions

import matplotlib as mpl
import matplotlib.pyplot as plt
from matplotlib.patches import Rectangle

fig,ax = plt.subplots(1)
n=2
for i in range(0,n):
    for j in range(0,n):
        rect = mpl.patches.Rectangle((200+200*i,200+200*j),10*n, 10*n, linewidth=1, edgecolor='black', facecolor='black')
        ax.add_patch(rect)
    ax.hlines(200+200*i+10, 200, 400, zorder=0)
    ax.vlines(200+200*i+10, 200, 400, zorder=0)

ax.set_xlim(left = 0, right = 220*n)
ax.set_ylim(bottom = 0, top = 220*n)
plt.show()

Answered By - Michael S.