#272 Map a color to bubble plot

A bubble plot is a scatterplot with a third dimension: the size of the markers. It is even possible to add a fourth dimension using colors. this is possible using the ‘cmap‘ argument of the scatter function of matplotlib.

# libraries
import matplotlib.pyplot as plt
import numpy as np
import seaborn as sns

# create data
x = np.random.rand(15)
y = x+np.random.rand(15)
z = x+np.random.rand(15)
z=z*z

# Change color with c and alpha. I map the color to the X axis value.
plt.scatter(x, y, s=z*2000, c=x, cmap="Blues", alpha=0.4, edgecolors="grey", linewidth=2)

# Add titles (main and on axis)
plt.xlabel("the X axis")
plt.ylabel("the Y axis")
plt.title("A colored bubble plot")

plt.show()