upd

exam/archive/scripts/5.py

@@ -0,0 +1,19 @@
+import numpy as np
+import matplotlib.pyplot as plt
+
+R = 1.0
+E0 = 1.0
+
+r = np.linspace(0, 2.5*R, 500)
+
+E = np.where(r <= R, E0 * r / R, E0 * (R**2) / (r**2))
+
+# plot
+plt.plot(r, E)
+plt.xlabel("r")
+plt.ylabel("E(r)")
+plt.grid(True)
+
+plt.savefig("5.png", dpi=300, bbox_inches="tight")
+plt.show()
+