matplotlibのラインやポイントをいろいろ変更します。

lines.py

import numpy as np
import matplotlib.pyplot as plt
 
x = np.arange(-5, 5, 0.1)
y = np.sin(x)
 
plt.plot(x,     y, "-",  label="-")
plt.plot(x+0.2, y, "--", label="--")
plt.plot(x+0.4, y, "-.", label="-.")
plt.plot(x+0.6, y, ":",  label=":")
 
plt.legend()
 
plt.xlim(-np.pi, np.pi)
 
plt.savefig("lines.png")

points.py

import numpy as np
import matplotlib.pyplot as plt
 
x = np.arange(0, 50, 0.5)
 
plt.plot(x, x, ".", label=".")
plt.plot(x+1, x, ",", label=",")
plt.plot(x+2, x, "o", label="o")
plt.plot(x+3, x, "^", label="^")
plt.plot(x+4, x, "v", label="v")
plt.plot(x+5, x, "<", label="<")
plt.plot(x+6, x, ">", label=">")
plt.plot(x+7, x, "s", label="s")
plt.plot(x+8, x, "+", label="+")
plt.plot(x+9, x, "x", label="x")
plt.plot(x+10, x, "D", label="D")
plt.plot(x+11, x, "d", label="d")
plt.plot(x+12, x, "1", label="1")
plt.plot(x+13, x, "2", label="2")
plt.plot(x+14, x, "3", label="3")
plt.plot(x+15, x, "4", label="4")
plt.plot(x+16, x, "h", label="5")
plt.plot(x+17, x, "H", label="6")
plt.plot(x+18, x, "p", label="p")
plt.plot(x+19, x, "|", label="|")
plt.plot(x+20, x, "_", label="_")
 
plt.legend(fontsize=8)
 
plt.xlim(0, 30)
plt.ylim(0, 10)
 
plt.savefig("points.png")