Drawing a common horizontal line for multiple subplots

Question

I want that all the three subplots have a common horizontal line keeping the distance between the subplots unchanged. Basically I just want to fill the spaces between three horizontal lines to create one large horizontal line. How can this be done? Here is the figure

Here is the code

import numpy as np
import matplotlib.pyplot as plt

x_axis=['HE','BBHE','BHEPL','DOTHE','RSIHE','QDHE','RSWHE']
y_drive=[0.480,0.478,0.638,0.508,0.475,0.587,0.846]
y_stare=[0.759,0.766,0.856,0.659,0.777,0.767,0.865]
y_chase=[0.482,0.515,0.809,0.763,0.520,0.802,0.802]

x=np.array(np.arange(0,1.30,0.2))
x=np.arange(0,7)
width=1

fig,(ax1,ax2,ax3)=plt.subplots(1,3,sharey=True,sharex=True)    #returns subplot axes or object
ax1.bar(x,y_drive,width,color=['r','g','b','c','m','y','k'],alpha=0.80)
ax1.spines['top'].set_visible(False)
ax1.spines['right'].set_visible(False)
ax1.tick_params(axis='both',which='both',bottom=False,left=False,labelbottom=False)
ax1.set_xlabel('DRIVE')
ax1.set_ylim(0,1)

ax2.bar(x,y_stare,width,color=['r','g','b','c','m','y','k'],alpha=0.80)
ax2.spines['top'].set_visible(False)
ax2.spines['left'].set_visible(False)
ax2.spines['right'].set_visible(False)
ax2.tick_params(axis='both',which='both',bottom=False,left=False,labelbottom=False)
ax2.set_xlabel('STARE')

ax3.bar(x,y_chase,width,color=['r','g','b','c','m','y','k'],alpha=0.80)
ax3.spines['top'].set_visible(False)
ax3.spines['left'].set_visible(False)
ax3.spines['right'].set_visible(False)
ax3.tick_params(axis='both',which='both',bottom=False,left=False,labelbottom=False)
ax3.set_xlabel('CHASE')

plt.show()

The same way as you have create each subplot, have you try it? — Florian Bernard, Oct 30 '19 at 12:42
Did you try from this awnser : https://stackoverflow.com/questions/34933905/matplotlib-adding-subplots-to-a-subplot — Florian Bernard, Oct 30 '19 at 13:19

score 1 · Accepted Answer · answered Oct 30 '19 at 13:59

1

Here is a solution without using multiple plots. The trick is to use a custom x-values and width.

fig, ax1 = plt.subplots()    #returns subplot axes or object

x=np.arange(-0.75, 0.8, 0.25)
width=1/4.

ax1.bar(x,y_drive,width,color=['r','g','b','c','m','y','k'],alpha=0.80)
ax1.bar(x+2,y_stare,width,color=['r','g','b','c','m','y','k'],alpha=0.80)
ax1.bar(x+4,y_chase,width,color=['r','g','b','c','m','y','k'],alpha=0.80)

ax1.set_xticks(range(0, 6, 2))
ax1.set_xticklabels(['DRIVE', 'STARE', 'CHASE'])
ax1.tick_params(axis='both',which='both',bottom=False,left=False,labelbottom=True)

ax1.spines['top'].set_visible(False)
ax1.spines['right'].set_visible(False)

ax1.set_ylim(0,1)

answered Oct 30 '19 at 13:59

Sheldore

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Just a simple query, what if I want to add legend corresponding to each color. How can this be done? – Navdeep Oct 30 '19 at 15:05
@Navdeep : Check [this](https://stackoverflow.com/questions/18974928/how-to-create-custom-legend-in-matplotlib-based-on-the-value-of-the-barplot) answer and search for other similar posts using "custom legends in bar chart matplotlib" – Sheldore Oct 30 '19 at 21:45

Drawing a common horizontal line for multiple subplots

1 Answers1