Matplotlib_Twin_Axis_Plots.py

# -------------------------------------------------------------------------
# -------------------------------------------------------------------------
# Matplotlib Twin Axis Plots
# Description: plot histogram and line chart together in a dual-axis approach
# -------------------------------------------------------------------------
# -------------------------------------------------------------------------
import matplotlib.pyplot as plt
import seaborn as sns; 
sns.set(style="whitegrid", color_codes=True)
%matplotlib inline

bins = range(0, [INSERT SOME VALUES]) # set for bar chart
fig, ax1 = plt.subplots(figsize=(10,8))

# -------------------------------------------------------------------------
# For the First Plot (Histogram)
# -------------------------------------------------------------------------
ax1.hist(df['INSERT THE CATEGORICAL VARIABLE'].values, bins=bins, edgecolor='k', align='left');
ax1.set_ylabel('[INSERT YOUR Y_LABEL Of THE FIRST PLOT]')

# -------------------------------------------------------------------------
# For the Second Plot (Line Chart)
# -------------------------------------------------------------------------
ax2 = ax1.twinx()
ax2.plot(df['INSERT THE CATEGORICAL VARIABLE (SAME AS ABOVE)'].values, df['INSERT THE NUMERICAL VARIABLE'].values, marker='x', color='r')
ax2.set_ylabel('[INSERT YOUR Y_LABEL Of THE SECOND PLOT]', color='r')
ax2.tick_params('y', colors='r')

plt.title('[INSERT YOUR TITLE]')
plt.tight_layout()
plt.show();