Python Data Visualisation for Business Analyst – How to plot Diverging Dot in Python

(Python Data Visualisation Tutorials)

Python Data Visualisation for Business Analyst – How to plot Diverging Dot in Python

In this data visualisation tutorial, you will learn How to plot Diverging Texts in Python.

Diverging dot plot is also similar to the diverging bars. However compared to diverging bars, the absence of bars reduces the amount of contrast and disparity between the groups.



Run this once before the plot’s code. The individual charts, however, may redefine its own aesthetics.

/* !pip install brewer2mpl */
import numpy as np
import pandas as pd
import matplotlib as mpl
import matplotlib.pyplot as plt
import seaborn as sns
import warnings; warnings.filterwarnings(action='once')

large = 22; med = 16; small = 12
params = {'axes.titlesize': large,
          'legend.fontsize': med,
          'figure.figsize': (16, 10),
          'axes.labelsize': med,
          'axes.titlesize': med,
          'xtick.labelsize': med,
          'ytick.labelsize': med,
          'figure.titlesize': large}
%matplotlib inline

/* Version */
Data: mtcars


How to plot Diverging Dot in Python

Download Code:

/* Prepare Data */
df = pd.read_csv("mtcars.csv")
x = df.loc[:, ['mpg']]
df['mpg_z'] = (x - x.mean())/x.std()
df['colors'] = ['red' if x < 0 else 'darkgreen' for x in df['mpg_z']]
df.sort_values('mpg_z', inplace=True)

/* Draw plot */
plt.figure(figsize=(14,16), dpi= 80)
plt.scatter(df.mpg_z, df.index, s=450, alpha=.6, color=df.colors)
for x, y, tex in zip(df.mpg_z, df.index, df.mpg_z):
    t = plt.text(x, y, round(tex, 1), horizontalalignment='center', 
                 verticalalignment='center', fontdict={'color':'white'})

/* Decorations */
/* Lighten borders */

plt.title('Diverging Dotplot of Car Mileage', fontdict={'size':20})
plt.grid(linestyle='--', alpha=0.5)
plt.xlim(-2.5, 2.5)

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Python Data Visualisation for Business Analyst – How to plot Diverging Texts in Python

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