小编Boo*_*gns的帖子

我正在创建一个可以模拟电场线的python脚本,但箭头图中出现的箭头太大了.我已经尝试过更改单位和比例,但是matplotlib上的文档对我来说也没有意义......当系统中只有一次充电时,这似乎只是一个主要问题,但是箭头仍然略显过大任何数量的指控.箭头往往在所有情况下都过大,但最明显的只有一个粒子.

import matplotlib.pyplot as plt
import numpy as np
import sympy as sym
import astropy as astro

k = 9 * 10 ** 9


def get_inputs():
    inputs_loop = False
    while inputs_loop is False:
        """"
        get inputs
        """
        inputs_loop = True
        particles_loop = False
        while particles_loop is False:
            try:
                particles_loop = True
                """
                get n particles with n charges.
                """
                num_particles = int(raw_input('How many particles are in the system? '))
                parts = []
                for i in range(num_particles):
                    parts.append([float(raw_input("What is the charge …