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"""
==============================================
Mapping marker properties to multivariate data
==============================================
This example shows how to use different properties of markers to plot
multivariate datasets. Here we represent a successful baseball throw as a
smiley face with marker size mapped to the skill of thrower, marker rotation to
the take-off angle, and thrust to the marker color.
"""
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.colors import Normalize
from matplotlib.markers import MarkerStyle
from matplotlib.text import TextPath
from matplotlib.transforms import Affine2D
SUCCESS_SYMBOLS = [
TextPath((0, 0), "☹"),
TextPath((0, 0), "😒"),
TextPath((0, 0), "☺"),
]
N = 25
np.random.seed(42)
skills = np.random.uniform(5, 80, size=N) * 0.1 + 5
takeoff_angles = np.random.normal(0, 90, N)
thrusts = np.random.uniform(size=N)
successful = np.random.randint(0, 3, size=N)
positions = np.random.normal(size=(N, 2)) * 5
data = zip(skills, takeoff_angles, thrusts, successful, positions)
cmap = plt.colormaps["plasma"]
fig, ax = plt.subplots()
fig.suptitle("Throwing success", size=14)
for skill, takeoff, thrust, mood, pos in data:
t = Affine2D().scale(skill).rotate_deg(takeoff)
m = MarkerStyle(SUCCESS_SYMBOLS[mood], transform=t)
ax.plot(pos[0], pos[1], marker=m, color=cmap(thrust))
fig.colorbar(plt.cm.ScalarMappable(norm=Normalize(0, 1), cmap=cmap),
ax=ax, label="Normalized Thrust [a.u.]")
ax.set_xlabel("X position [m]")
ax.set_ylabel("Y position [m]")
plt.show()
# %%
# .. tags::
#
# component: marker
# styling: color,
# styling: shape
# level: beginner
# purpose: fun
|
